WATER AND HYDROGEN

Burning candle wax in air.

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



Test for the products of burning candle wax in air.

Teacher demonstrations;
Discussion.

Candles, lime water.

K.L.B.
BOOK I
PP. 91-92

WATER AND HYDROGEN

Reaction of cold water with metals.
Reaction of steam with metals.

By the end of the lesson, the learner should be able to:
Identify products of reaction of cold water with metals.
Identify products of reaction of steam with metals.
Recall the reactivity series of metals based on reaction with water.

Teacher demonstrations;
Discussion;
Write equations.
Test for evolved gas;
Review reactivity series.

Calcium, sodium grain.
Magnesium ribbon, sand, iron / steel wool.

K.L.B.
BOOK I
PP. 92-94

WATER AND HYDROGEN

Hydrogen. - lab preparation.
Hydrogen. - physical properties.
Hydrogen as a reducing agent.
Burning hydrogen in air.

By the end of the lesson, the learner should be able to:
Describe laboratory preparation of hydrogen.
State physical properties of hydrogen.
Describe an experiment to show reducing properties of hydrogen.
Identify products of burning hydrogen in air.

Teacher demonstrations;
Discussion.
Probing questions and discussion.
Teacher demonstration;
Discussion;
Write equations.
Discussion.

Zinc granules,
dil HCl,
conc. sulphuric acid.
conc. sulphuric acid, litmus papers.
Copper (II) oxide, anhydrous Copper (II) sulphate., dry hydrogen.
Anhydrous calcium chloride,
hydrogen, U tube, ice cold water.

K.L.B.
BOOK I
P. 97
K.L.B.
BOOK I
PP. 99-101

WATER AND HYDROGEN
THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Uses of hydrogen.
Atomic and mass numbers.

By the end of the lesson, the learner should be able to:
State uses of hydrogen.
Name the subatomic particles in an atom.
Define atomic number and mass number of an atom.
Represent atomic and mass numbers symbolically.

Probing questions;
Open discussion.
Exposition on new concepts;
Brief discussion.

TEXT BOOK

K.L.B.
BOOK I
PP. 102-103

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

First twenty elements of the periodic table.
Isotopes.

By the end of the lesson, the learner should be able to:
List the first twenty elements of the periodic table.
Write chemical symbols of the first twenty elements of the periodic table.
Define isotopes.
Give examples of isotopes.

Expository approach: referring to the periodic table, teacher exposes the first twenty elements.
Writing down a list of first twenty elements of the periodic table.
Exposition of definition and examples of isotopes.
Giving examples of isotopes.

Periodic table.

K.L.B.
BOOK II

PP. 1-3

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Electronic configuration.
Electronic configuration in diagrams.
Periods of the periodic table.

By the end of the lesson, the learner should be able to:
Represent isotopes symbolically.
Define an energy level.
Describe electronic configuration in an atom.
Represent electronic configuration diagrammatically.
Identify elements of the same period.

Exposition ? teacher exposes new concepts about electronic configuration.
Written exercise.
Supervised practice;
Exposition ? Definition of a period.
Q/A: Examples of elements of the same period.

Periodic table.
text book

K.L.B.
BOOK II
P. 4





PP. 5-9
K.L.B. BOOK IIP. 9

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Groups of the periodic table.
R.M.M. and isotopes.

By the end of the lesson, the learner should be able to:
Identify elements of the same period.
Calculate R.M.M. from isotopic composition.

Exposition ? definition of a group.
Q/A: examples of elements of the same group.
Supervised practice involving calculation of RMM from isotopic composition.

Periodic table.
text book

K.L.B. BOOK IIP. 9

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Positive ions and ion formation.

By the end of the lesson, the learner should be able to:
To define an ion and a cation.

Teacher gives examples of stable atoms.
Guided discovery that metals need to lose one, two or three electrons to attain stability.
Examples of positive ions.

text book

K.L.B. BOOK IIPP 14-15

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Positive ions representation.
Negative ions and ion formation.
Valencies of metals.

By the end of the lesson, the learner should be able to:
To represent formation of positive ions symbolically.
To define an anion.
To describe formation of negative ions symbolically.
Recall valencies of metals among the first twenty elements in the periodic table.

Diagrammatic representation of cations.
Teacher gives examples of stable atoms.
Guided discovery of formation of negative ions.
Diagrammatic representation of anions.
Q/A to review previous lesson;
Exposition;
Guided discovery.

Chart  ion model.
Chart  ion model.
Periodic table.

K.L.B. BOOK IIP 16
K.L.B. BOOK IIP 17

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Valencie of non-metals.

By the end of the lesson, the learner should be able to:
Recall valencies of non-metals among the first twenty elements in the periodic table.

Q/A to review previous lesson;
Exposition;
Guided discovery.

Periodic table.

K.L.B. BOOK IIP 17

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Valencies of radicals.

By the end of the lesson, the learner should be able to:
Define a radical.
Recall the valencies of common radicals.

Exposition ? teacher defines a radical, gives examples of radicals and exposes their valencies.
Students draw a table of radicals and their valencies.

text book

K.L.B. BOOK IIP 18

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Oxidation number.
Electronic configuration, ion formed, valency and oxidation number

By the end of the lesson, the learner should be able to:
Define oxidation number.
Predict oxidation numbers from position of elements in the periodic table.
Relate electronic configuration, ion formed, valency and oxidation number of different elements.

Q/A: Valencies.
Expose oxidation numbers of common ions.
Students complete a table of ions and their oxidation numbers.

Written exercise;
Exercise review.

The periodic table.
text book

K.L.B. BOOK IIvP 18
K.L.B. BOOK IIP 18

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Chemical formulae of compounds. - Elements of equal valencies.

By the end of the lesson, the learner should be able to:
To derive the formulae of some compounds involving elements of equal valencies.

Discuss formation of compounds such as NaCl, MgO.

text book

K.L.B. BOOK IIPP 19-20

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Chemical formulae of compounds. -Elements of unequal valencies.

By the end of the lesson, the learner should be able to:
To derive the formulae of some compounds involving elements of unequal valencies.

Discuss formation of compounds such as MgCl2
Al (NO3)3

text book

K.L.B. BOOK IIPP 19-20

THE STRUCTURE OF THE ATOM & THE PERIODIC TABLE

Chemical formulae of compounds. -Elements of variable valencies.
Chemical equations.
Balanced chemical equations.
Balanced chemical equations.(contd)

By the end of the lesson, the learner should be able to:
To derive the formulae of some compounds involving elements of variable valencies.
To identify components of chemical equations.
To balance chemical equations correctly.

Discuss formation of compounds such as
-Copper (I) Oxide.
-Copper (II) Oxide.
-Iron (II) Sulphate.
-Iron (III) Sulphate.
Review word equations;
Exposition of new concepts with probing questions;
Brief discussion.
Exposition;
Supervised practice.
Supervised practice;
Written exercise.

text book

K.L.B. BOOK IIP 20
K.L.B. BOOK IIPP 24-25