Inorganic Chemistry

Structure of the atom - Dalton's atomic model

By the end of the lesson, the learner should be able to:

- Describe the structure of the atom using Dalton's model
- Explain the key postulates of Dalton's atomic theory
- Relate Dalton's model to the concept of matter being made of small particles

- Review with peers the concept of the structure of the atom
- Search for information on Dalton's atomic model
- Draw a representation of Dalton's atomic model

How did Dalton describe the structure of atoms?

- Access and Learn Chemistry Learner's Book pg. 17
- Digital devices
- Charts showing atomic models

- Oral questions - Observation - Written exercises

Inorganic Chemistry

Structure of the atom - Rutherford's atomic model

By the end of the lesson, the learner should be able to:

- Describe the structure of the atom using Rutherford's model
- Explain the gold foil experiment and its findings
- Connect Rutherford's discoveries to our understanding of nuclear structure

- Watch simulation on the Rutherford Gold Foil experiment
- Discuss with peers the observations and conclusions of the experiment
- Draw a representation of Rutherford's atomic model

What did Rutherford's gold foil experiment reveal about the atom?

- Access and Learn Chemistry Learner's Book pg. 18
- Digital devices
- Internet access

- Oral questions - Written exercises - Group discussions

Inorganic Chemistry

Structure of the atom - Rutherford's atomic model

By the end of the lesson, the learner should be able to:

- Describe the structure of the atom using Rutherford's model
- Explain the gold foil experiment and its findings
- Connect Rutherford's discoveries to our understanding of nuclear structure

- Watch simulation on the Rutherford Gold Foil experiment
- Discuss with peers the observations and conclusions of the experiment
- Draw a representation of Rutherford's atomic model

What did Rutherford's gold foil experiment reveal about the atom?

- Access and Learn Chemistry Learner's Book pg. 18
- Digital devices
- Internet access

- Oral questions - Written exercises - Group discussions

Inorganic Chemistry

Structure of the atom - Bohr's atomic model

By the end of the lesson, the learner should be able to:

- Describe the structure of the atom using Bohr's model
- Explain the concept of energy levels in an atom
- Relate Bohr's model to how electrons orbit the nucleus like planets around the sun

- Search for information on Bohr's atomic model
- Watch animations on atomic models
- Draw and label Bohr's atomic model

How did Bohr improve on Rutherford's atomic model?

- Access and Learn Chemistry Learner's Book pg. 20
- Digital devices
- Charts showing Bohr's model

- Oral questions - Observation - Written exercises

Inorganic Chemistry

Structure of the atom - Comparing atomic models

By the end of the lesson, the learner should be able to:

- Compare Dalton, Rutherford and Bohr atomic models
- Identify the contributions of each scientist to atomic theory
- Create timelines showing the historical development of atomic models

- Discuss with peers the similarities and differences between atomic models
- Create a timeline highlighting contributions of scientists in atomic theory development
- Present findings to classmates

How did atomic models evolve from Dalton to Bohr?

- Access and Learn Chemistry Learner's Book pg. 21
- Digital devices
- Manila papers

- Group presentations - Written exercises - Observation

Inorganic Chemistry

Structure of the atom - Modelling project

By the end of the lesson, the learner should be able to:

- Construct a model of an atom using locally available materials
- Label the nucleus, protons, neutrons and electrons on the model
- Apply creative skills to represent abstract scientific concepts physically

- Use locally available materials to model the structure of the atom
- Label the parts of the atomic model
- Display the constructed model for peer assessment

How can we represent the structure of an atom using locally available materials?

- Access and Learn Chemistry Learner's Book pg. 22
- Locally available materials
- Scissors, glue

- Project assessment - Peer evaluation - Observation

Inorganic Chemistry

Structure of the atom - Modelling project

By the end of the lesson, the learner should be able to:

- Construct a model of an atom using locally available materials
- Label the nucleus, protons, neutrons and electrons on the model
- Apply creative skills to represent abstract scientific concepts physically

- Use locally available materials to model the structure of the atom
- Label the parts of the atomic model
- Display the constructed model for peer assessment

How can we represent the structure of an atom using locally available materials?

- Access and Learn Chemistry Learner's Book pg. 22
- Locally available materials
- Scissors, glue

- Project assessment - Peer evaluation - Observation

Inorganic Chemistry

Relative Atomic Mass - Atomic number and mass number

By the end of the lesson, the learner should be able to:

- Define atomic number and mass number
- Calculate the number of protons, neutrons and electrons in an atom
- Use atomic notation to represent atoms of different elements

- Discuss with peers the relationship between atomic number, mass number and number of electrons
- Calculate the number of subatomic particles in given atoms
- Practise writing atomic notation for elements

What is the relationship between atomic number, mass number and number of neutrons?

- Access and Learn Chemistry Learner's Book pg. 24
- Periodic table
- Digital devices

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Relative Atomic Mass - Meaning of isotopes

By the end of the lesson, the learner should be able to:

- Define isotopes of an element
- Identify isotopes of common elements
- Relate isotopes to applications like carbon dating and medical imaging

- Brainstorm the meaning of the term isotopes
- Study diagrams showing isotopes of sodium
- Discuss with peers the characteristics of isotopes

Why do atoms of the same element have different masses?

- Access and Learn Chemistry Learner's Book pg. 24
- Digital devices
- Charts showing isotopes

- Oral questions - Written exercises - Group discussions

Inorganic Chemistry

Relative Atomic Mass - Meaning of isotopes

By the end of the lesson, the learner should be able to:

- Define isotopes of an element
- Identify isotopes of common elements
- Relate isotopes to applications like carbon dating and medical imaging

- Brainstorm the meaning of the term isotopes
- Study diagrams showing isotopes of sodium
- Discuss with peers the characteristics of isotopes

Why do atoms of the same element have different masses?

- Access and Learn Chemistry Learner's Book pg. 24
- Digital devices
- Charts showing isotopes

- Oral questions - Written exercises - Group discussions

Inorganic Chemistry

Relative Atomic Mass - Meaning and calculation

By the end of the lesson, the learner should be able to:

- Define Relative Atomic Mass (R.A.M)
- Explain the concept of isotopic abundance
- Connect R.A.M to the values shown on the periodic table

- Search for information on Relative Atomic Mass
- Discuss with peers the meaning of isotopic abundance
- Study the relationship between R.A.M and isotopes

What is Relative Atomic Mass and why is it not always a whole number?

- Access and Learn Chemistry Learner's Book pg. 27
- Digital devices
- Periodic table

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Relative Atomic Mass - Calculations from isotopic abundances I

By the end of the lesson, the learner should be able to:

- Apply the formula for calculating R.A.M from isotopic abundances
- Calculate R.A.M for elements with two isotopes
- Solve numerical problems involving simple isotopic compositions

- Study worked examples on calculating R.A.M
- Calculate the R.A.M of elements with two isotopes
- Compare calculations with classmates for peer learning

How do you calculate the Relative Atomic Mass of an element from its isotopic abundances?

- Access and Learn Chemistry Learner's Book pg. 27
- Scientific calculators
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Relative Atomic Mass - Calculations from isotopic abundances I

By the end of the lesson, the learner should be able to:

- Apply the formula for calculating R.A.M from isotopic abundances
- Calculate R.A.M for elements with two isotopes
- Solve numerical problems involving simple isotopic compositions

- Study worked examples on calculating R.A.M
- Calculate the R.A.M of elements with two isotopes
- Compare calculations with classmates for peer learning

How do you calculate the Relative Atomic Mass of an element from its isotopic abundances?

- Access and Learn Chemistry Learner's Book pg. 27
- Scientific calculators
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Relative Atomic Mass - Calculations from isotopic abundances II

By the end of the lesson, the learner should be able to:

- Calculate R.A.M for elements with three or more isotopes
- Solve complex problems involving isotopic abundances
- Apply R.A.M calculations to real-world chemistry problems

- Study worked examples on R.A.M calculations for multiple isotopes
- Calculate R.A.M for elements with three isotopes
- Solve practice problems on isotopic abundances

How do you calculate R.A.M for elements with multiple isotopes?

- Access and Learn Chemistry Learner's Book pg. 28
- Scientific calculators
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Relative Atomic Mass - Calculations from isotopic abundances II

By the end of the lesson, the learner should be able to:

- Calculate R.A.M for elements with three or more isotopes
- Solve complex problems involving isotopic abundances
- Apply R.A.M calculations to real-world chemistry problems

- Study worked examples on R.A.M calculations for multiple isotopes
- Calculate R.A.M for elements with three isotopes
- Solve practice problems on isotopic abundances

How do you calculate R.A.M for elements with multiple isotopes?

- Access and Learn Chemistry Learner's Book pg. 28
- Scientific calculators
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Relative Atomic Mass - Determining relative abundance

By the end of the lesson, the learner should be able to:

- Calculate relative abundance of isotopes given R.A.M
- Solve reverse problems on isotopic abundances
- Apply mathematical skills to determine isotope compositions

- Study worked examples on determining relative abundance
- Calculate relative abundances from given R.A.M values
- Practise solving reverse problems

How can you determine the relative abundance of isotopes if you know the R.A.M?

- Access and Learn Chemistry Learner's Book pg. 29
- Scientific calculators
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Relative Atomic Mass - Determining relative abundance

By the end of the lesson, the learner should be able to:

- Calculate relative abundance of isotopes given R.A.M
- Solve reverse problems on isotopic abundances
- Apply mathematical skills to determine isotope compositions

- Study worked examples on determining relative abundance
- Calculate relative abundances from given R.A.M values
- Practise solving reverse problems

How can you determine the relative abundance of isotopes if you know the R.A.M?

- Access and Learn Chemistry Learner's Book pg. 29
- Scientific calculators
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Relative Atomic Mass - Determining relative abundance

By the end of the lesson, the learner should be able to:

- Calculate relative abundance of isotopes given R.A.M
- Solve reverse problems on isotopic abundances
- Apply mathematical skills to determine isotope compositions

- Study worked examples on determining relative abundance
- Calculate relative abundances from given R.A.M values
- Practise solving reverse problems

How can you determine the relative abundance of isotopes if you know the R.A.M?

- Access and Learn Chemistry Learner's Book pg. 29
- Scientific calculators
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Relative Atomic Mass - Practical activity with dice

By the end of the lesson, the learner should be able to:

- Simulate isotopic abundances using dice
- Calculate R.A.M from simulated data
- Connect hands-on activities to abstract chemical concepts

- Carry out activities using dice to simulate isotopic abundances
- Record and calculate R.A.M from simulated data
- Compare results with actual R.A.M values

How can we use a simulation to understand isotopic abundances?

- Access and Learn Chemistry Learner's Book pg. 30
- Coloured dice
- Flashcards

- Practical assessment - Written exercises - Observation

Inorganic Chemistry

Relative Atomic Mass - Practical activity with dice

By the end of the lesson, the learner should be able to:

- Simulate isotopic abundances using dice
- Calculate R.A.M from simulated data
- Connect hands-on activities to abstract chemical concepts

- Carry out activities using dice to simulate isotopic abundances
- Record and calculate R.A.M from simulated data
- Compare results with actual R.A.M values

How can we use a simulation to understand isotopic abundances?

- Access and Learn Chemistry Learner's Book pg. 30
- Coloured dice
- Flashcards

- Practical assessment - Written exercises - Observation

Inorganic Chemistry

Electron arrangement - Energy levels and sub-levels

By the end of the lesson, the learner should be able to:

- Define energy levels and sub-levels in an atom
- Identify the sub-levels present in the first four energy levels
- Relate energy levels to the floors of a building and sub-levels to apartments

- Discuss the relationship between energy levels and orbitals
- Study the sub-levels for the first four energy levels
- Create a table showing energy levels and their sub-levels

How are electrons organized within energy levels?

- Access and Learn Chemistry Learner's Book pg. 32
- Digital devices
- Charts showing energy levels

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Electron arrangement - Energy levels and sub-levels

By the end of the lesson, the learner should be able to:

- Define energy levels and sub-levels in an atom
- Identify the sub-levels present in the first four energy levels
- Relate energy levels to the floors of a building and sub-levels to apartments

- Discuss the relationship between energy levels and orbitals
- Study the sub-levels for the first four energy levels
- Create a table showing energy levels and their sub-levels

How are electrons organized within energy levels?

- Access and Learn Chemistry Learner's Book pg. 32
- Digital devices
- Charts showing energy levels

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Electron arrangement - Energy levels and sub-levels

By the end of the lesson, the learner should be able to:

- Define energy levels and sub-levels in an atom
- Identify the sub-levels present in the first four energy levels
- Relate energy levels to the floors of a building and sub-levels to apartments

- Discuss the relationship between energy levels and orbitals
- Study the sub-levels for the first four energy levels
- Create a table showing energy levels and their sub-levels

How are electrons organized within energy levels?

- Access and Learn Chemistry Learner's Book pg. 32
- Digital devices
- Charts showing energy levels

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Electron arrangement - Energy levels and sub-levels

By the end of the lesson, the learner should be able to:

- Define energy levels and sub-levels in an atom
- Identify the sub-levels present in the first four energy levels
- Relate energy levels to the floors of a building and sub-levels to apartments

- Discuss the relationship between energy levels and orbitals
- Study the sub-levels for the first four energy levels
- Create a table showing energy levels and their sub-levels

How are electrons organized within energy levels?

- Access and Learn Chemistry Learner's Book pg. 32
- Digital devices
- Charts showing energy levels

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Electron arrangement - Types of orbitals

By the end of the lesson, the learner should be able to:

- Describe the shapes of s and p orbitals
- Identify the number of orbitals in each sub-level
- Visualize orbital shapes as regions where electrons are likely found

- Search for information on types of orbitals
- Study diagrams showing shapes of s and p orbitals
- Watch videos showing electrons in various orbitals

What do s and p orbitals look like?

- Access and Learn Chemistry Learner's Book pg. 34
- Digital devices
- Charts showing orbital shapes

- Oral questions - Written exercises - Group discussions

Inorganic Chemistry

Electron arrangement - Aufbau's principle

By the end of the lesson, the learner should be able to:

- State the Aufbau's principle
- Apply the order of filling electrons in orbitals
- Compare electron filling to constructing a building from the foundation upwards

- Search for information on Aufbau's principle
- Study the diagram showing order of filling electrons
- Discuss with peers how electrons fill orbitals

In what order do electrons fill the orbitals in an atom?

- Access and Learn Chemistry Learner's Book pg. 36
- Digital devices
- Aufbau diagram

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Electron arrangement - Aufbau's principle

By the end of the lesson, the learner should be able to:

- State the Aufbau's principle
- Apply the order of filling electrons in orbitals
- Compare electron filling to constructing a building from the foundation upwards

- Search for information on Aufbau's principle
- Study the diagram showing order of filling electrons
- Discuss with peers how electrons fill orbitals

In what order do electrons fill the orbitals in an atom?

- Access and Learn Chemistry Learner's Book pg. 36
- Digital devices
- Aufbau diagram

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Electron arrangement - Aufbau's principle

By the end of the lesson, the learner should be able to:

- State the Aufbau's principle
- Apply the order of filling electrons in orbitals
- Compare electron filling to constructing a building from the foundation upwards

- Search for information on Aufbau's principle
- Study the diagram showing order of filling electrons
- Discuss with peers how electrons fill orbitals

In what order do electrons fill the orbitals in an atom?

- Access and Learn Chemistry Learner's Book pg. 36
- Digital devices
- Aufbau diagram

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Electron arrangement - Aufbau's principle

By the end of the lesson, the learner should be able to:

- State the Aufbau's principle
- Apply the order of filling electrons in orbitals
- Compare electron filling to constructing a building from the foundation upwards

- Search for information on Aufbau's principle
- Study the diagram showing order of filling electrons
- Discuss with peers how electrons fill orbitals

In what order do electrons fill the orbitals in an atom?

- Access and Learn Chemistry Learner's Book pg. 36
- Digital devices
- Aufbau diagram

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Electron arrangement - Writing s and p notation I

By the end of the lesson, the learner should be able to:

- Write electron arrangement of elements 1-10 using s and p notation
- Follow the steps for writing electron arrangements
- Apply the rules for filling electrons in s and p orbitals

- Study worked examples on writing s and p notation
- Draw electron arrangements for elements 1-10
- Practise writing s and p notation independently

How do you write the electron arrangement of an element using s and p notation?

- Access and Learn Chemistry Learner's Book pg. 38
- Periodic table
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Electron arrangement - Writing s and p notation II

By the end of the lesson, the learner should be able to:

- Write electron arrangement of elements 11-20 using s and p notation
- Complete the electron arrangement table for the first 20 elements
- Connect electron arrangements to the position of elements in the periodic table

- Copy and complete the table of electron arrangements for the first 20 elements
- Compare electron arrangements with classmates
- Identify patterns in electron arrangements

What patterns can you observe in the electron arrangements of the first 20 elements?

- Access and Learn Chemistry Learner's Book pg. 39
- Periodic table
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Electron arrangement - Writing s and p notation II

By the end of the lesson, the learner should be able to:

- Write electron arrangement of elements 11-20 using s and p notation
- Complete the electron arrangement table for the first 20 elements
- Connect electron arrangements to the position of elements in the periodic table

- Copy and complete the table of electron arrangements for the first 20 elements
- Compare electron arrangements with classmates
- Identify patterns in electron arrangements

What patterns can you observe in the electron arrangements of the first 20 elements?

- Access and Learn Chemistry Learner's Book pg. 39
- Periodic table
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Electron arrangement - Writing s and p notation II

By the end of the lesson, the learner should be able to:

- Write electron arrangement of elements 11-20 using s and p notation
- Complete the electron arrangement table for the first 20 elements
- Connect electron arrangements to the position of elements in the periodic table

- Copy and complete the table of electron arrangements for the first 20 elements
- Compare electron arrangements with classmates
- Identify patterns in electron arrangements

What patterns can you observe in the electron arrangements of the first 20 elements?

- Access and Learn Chemistry Learner's Book pg. 39
- Periodic table
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Electron arrangement - Writing s and p notation II

By the end of the lesson, the learner should be able to:

- Write electron arrangement of elements 11-20 using s and p notation
- Complete the electron arrangement table for the first 20 elements
- Connect electron arrangements to the position of elements in the periodic table

- Copy and complete the table of electron arrangements for the first 20 elements
- Compare electron arrangements with classmates
- Identify patterns in electron arrangements

What patterns can you observe in the electron arrangements of the first 20 elements?

- Access and Learn Chemistry Learner's Book pg. 39
- Periodic table
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Electron arrangement - Writing s and p notation II

By the end of the lesson, the learner should be able to:

- Write electron arrangement of elements 11-20 using s and p notation
- Complete the electron arrangement table for the first 20 elements
- Connect electron arrangements to the position of elements in the periodic table

- Copy and complete the table of electron arrangements for the first 20 elements
- Compare electron arrangements with classmates
- Identify patterns in electron arrangements

What patterns can you observe in the electron arrangements of the first 20 elements?

- Access and Learn Chemistry Learner's Book pg. 39
- Periodic table
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Electron arrangement - Practical activity

By the end of the lesson, the learner should be able to:

- Demonstrate electron filling using plastic beakers
- Model electron configurations using locally available materials
- Visualize abstract electron arrangements through hands-on activities

- Carry out activities to illustrate the order of filling electrons using labelled plastic beakers
- Use beads or pebbles to represent electrons
- Discuss the relationship between energy levels and orbitals

How can we demonstrate electron arrangement using locally available materials?

- Access and Learn Chemistry Learner's Book pg. 40
- Plastic beakers
- Beads or pebbles
- Labels

- Practical assessment - Observation - Written exercises

Inorganic Chemistry

Electron arrangement - Practical activity

By the end of the lesson, the learner should be able to:

- Demonstrate electron filling using plastic beakers
- Model electron configurations using locally available materials
- Visualize abstract electron arrangements through hands-on activities

- Carry out activities to illustrate the order of filling electrons using labelled plastic beakers
- Use beads or pebbles to represent electrons
- Discuss the relationship between energy levels and orbitals

How can we demonstrate electron arrangement using locally available materials?

- Access and Learn Chemistry Learner's Book pg. 40
- Plastic beakers
- Beads or pebbles
- Labels

- Practical assessment - Observation - Written exercises

Inorganic Chemistry

Electron arrangement - Practical activity

By the end of the lesson, the learner should be able to:

- Demonstrate electron filling using plastic beakers
- Model electron configurations using locally available materials
- Visualize abstract electron arrangements through hands-on activities

- Carry out activities to illustrate the order of filling electrons using labelled plastic beakers
- Use beads or pebbles to represent electrons
- Discuss the relationship between energy levels and orbitals

How can we demonstrate electron arrangement using locally available materials?

- Access and Learn Chemistry Learner's Book pg. 40
- Plastic beakers
- Beads or pebbles
- Labels

- Practical assessment - Observation - Written exercises

Inorganic Chemistry

Historical development of the periodic table I

By the end of the lesson, the learner should be able to:

- Describe the early attempts to classify elements
- Explain the law of triads and law of octaves
- Trace the evolution of element classification from ancient times

- Brainstorm in groups on the historical development of the periodic table
- Watch a video on the history of the periodic table
- Study the timeline of periodic table development

How did scientists first attempt to organize the elements?

- Access and Learn Chemistry Learner's Book pg. 45
- Digital devices
- Timeline charts

- Oral questions - Group discussions - Written exercises

Inorganic Chemistry

Historical development of the periodic table II

By the end of the lesson, the learner should be able to:

- Explain Mendeleev's contribution to the periodic table
- Describe Moseley's work on atomic numbers
- Recognize Mendeleev as the father of the periodic table

- Search for information on Mendeleev's and Moseley's contributions
- Discuss why Mendeleev is called the father of the periodic table
- Compare Mendeleev's table with the modern periodic table

Why is Mendeleev called the father of the periodic table?

- Access and Learn Chemistry Learner's Book pg. 46
- Digital devices
- Periodic table charts

- Oral questions - Written exercises - Group discussions

Inorganic Chemistry

Groups and periods I

By the end of the lesson, the learner should be able to:

- Define groups and periods in the periodic table
- Identify the number of groups and periods in the modern periodic table
- Relate groups to vertical columns and periods to horizontal rows

- Study the modern periodic table
- Discuss with peers the meaning of groups and periods
- Identify groups and periods in the periodic table

What are groups and periods in the periodic table?

- Access and Learn Chemistry Learner's Book pg. 49
- Periodic table
- Digital devices

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Groups and periods I

By the end of the lesson, the learner should be able to:

- Define groups and periods in the periodic table
- Identify the number of groups and periods in the modern periodic table
- Relate groups to vertical columns and periods to horizontal rows

- Study the modern periodic table
- Discuss with peers the meaning of groups and periods
- Identify groups and periods in the periodic table

What are groups and periods in the periodic table?

- Access and Learn Chemistry Learner's Book pg. 49
- Periodic table
- Digital devices

- Oral questions - Written exercises - Observation

Inorganic Chemistry

Groups and periods II

By the end of the lesson, the learner should be able to:

- Arrange the first 20 elements into groups and periods
- Relate electron arrangement to group and period number
- Use electron configuration to predict an element's position in the periodic table

- Copy and complete the table for the first 20 elements
- Identify elements belonging to each group and period
- Discuss how electron arrangement changes across periods

How does electron arrangement determine an element's position in the periodic table?

- Access and Learn Chemistry Learner's Book pg. 49
- Periodic table
- Digital devices

- Written exercises - Oral questions - Observation

Inorganic Chemistry

Position of an element and electron arrangement

By the end of the lesson, the learner should be able to:

- Relate the position of an element to its electron arrangement
- Determine group number from valence electrons
- Determine period number from number of energy levels

- Create element cards showing electron arrangements
- Place element cards in correct positions on a periodic table template
- Discuss how electron arrangement relates to group and period

How can you predict an element's position in the periodic table from its electron arrangement?

- Access and Learn Chemistry Learner's Book pg. 51
- Manila paper
- Graph paper
- Scissors

- Practical assessment - Oral questions - Observation

Inorganic Chemistry

Chemical families - Alkali metals and Alkaline earth metals

By the end of the lesson, the learner should be able to:

- Identify members of alkali metals and alkaline earth metals
- Describe common features of Group I and Group II elements
- Recognize everyday applications of these elements like sodium in salt and calcium in bones

- Identify elements in Group I and Group II
- Discuss with peers common features of alkali metals
- Search for information on properties of alkaline earth metals

What are the characteristics of alkali metals and alkaline earth metals?

- Access and Learn Chemistry Learner's Book pg. 53
- Periodic table
- Digital devices

- Oral questions - Written exercises - Group discussions

Inorganic Chemistry

Chemical families - Halogens and Noble gases

By the end of the lesson, the learner should be able to:

- Identify members of halogens and noble gases
- Describe common features of Group VII and Group VIII elements
- Connect halogens to uses like chlorine in water treatment and noble gases in lighting

- Identify elements in Group VII and Group VIII
- Discuss with peers common features of halogens
- Search for information on properties of noble gases

Why are noble gases called inert gases?

- Access and Learn Chemistry Learner's Book pg. 53
- Periodic table
- Digital devices

- Oral questions - Written exercises - Group discussions

Inorganic Chemistry

Chemical families - Halogens and Noble gases

By the end of the lesson, the learner should be able to:

- Identify members of halogens and noble gases
- Describe common features of Group VII and Group VIII elements
- Connect halogens to uses like chlorine in water treatment and noble gases in lighting

- Identify elements in Group VII and Group VIII
- Discuss with peers common features of halogens
- Search for information on properties of noble gases

Why are noble gases called inert gases?

- Access and Learn Chemistry Learner's Book pg. 53
- Periodic table
- Digital devices

- Oral questions - Written exercises - Group discussions

Inorganic Chemistry

Periodicity - Reactions of period 3 elements with chlorine and dilute acids

By the end of the lesson, the learner should be able to:

- Investigate reactions of period 3 elements with chlorine and dilute acids
- Write balanced equations for the reactions
- Connect periodic trends to prediction of element behaviour in chemical reactions

- Pass chlorine gas over heated sodium and magnesium
- Investigate reactions of magnesium with dilute HCl, dilute H₂SO₄ and dilute HNO₃
- Test gases produced
- Write chemical equations for all reactions
- Summarise trends in chemical properties across period 3

How do the chemical properties of elements change across period 3?

- Access & Learn Chemistry Learner's Book Grade 10 pg. 158
- Chlorine gas
- Dilute acids
- Sodium, magnesium
- Test tubes
- Bunsen burner

- Practical report - Written exercises - Oral questions

Inorganic Chemistry

Periodicity - Reactions of period 3 elements with chlorine and dilute acids

By the end of the lesson, the learner should be able to:

- Investigate reactions of period 3 elements with chlorine and dilute acids
- Write balanced equations for the reactions
- Connect periodic trends to prediction of element behaviour in chemical reactions

- Pass chlorine gas over heated sodium and magnesium
- Investigate reactions of magnesium with dilute HCl, dilute H₂SO₄ and dilute HNO₃
- Test gases produced
- Write chemical equations for all reactions
- Summarise trends in chemical properties across period 3

How do the chemical properties of elements change across period 3?

- Access & Learn Chemistry Learner's Book Grade 10 pg. 158
- Chlorine gas
- Dilute acids
- Sodium, magnesium
- Test tubes
- Bunsen burner

- Practical report - Written exercises - Oral questions

Inorganic Chemistry

Periodicity - Reactions of period 3 elements with chlorine and dilute acids

By the end of the lesson, the learner should be able to:

- Investigate reactions of period 3 elements with chlorine and dilute acids
- Write balanced equations for the reactions
- Connect periodic trends to prediction of element behaviour in chemical reactions

- Pass chlorine gas over heated sodium and magnesium
- Investigate reactions of magnesium with dilute HCl, dilute H₂SO₄ and dilute HNO₃
- Test gases produced
- Write chemical equations for all reactions
- Summarise trends in chemical properties across period 3

How do the chemical properties of elements change across period 3?

- Access & Learn Chemistry Learner's Book Grade 10 pg. 158
- Chlorine gas
- Dilute acids
- Sodium, magnesium
- Test tubes
- Bunsen burner

- Practical report - Written exercises - Oral questions