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Chemistry
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
1 1
CHEMICAL FAMILIES
Chemical properties of alkaline earth metals. Reaction of alkaline earth metals with oxygen.
By the end of the lesson, the learner should be able to:
To describe reaction of alkaline earth metals with oxygen
Q/A: Review reactions of Mg, Ca, with oxygen.
The corresponding word and then chemical equations are then written and their correctness verified by the teacher.
text book
K.L.B. BOOK IIP. 38
1 2
CHEMICAL FAMILIES
Chemical properties of alkaline earth metals. Reaction of alkaline earth metals with water.
By the end of the lesson, the learner should be able to:
To describe reaction of alkaline earth metals with water.
Q/A: Review reaction of metals with water.
Writing down word and balanced chemical equations for the reactions.
Deduce and discuss the order of reactivity down the group.
Some alkaline earth metals.
K.L.B. BOOK IIP. 39
1 3-4
CHEMICAL FAMILIES
Reaction of alkaline earth metals with chlorine gas.
Reaction of alkaline earth metals with dilute acids.
Chemical formulae of alkaline earth metals.
By the end of the lesson, the learner should be able to:
To write balanced equations for reaction of alkaline earth metals with chlorine gas.
Write chemical formulae for compounds of alkaline earth metals.
Explain formation of hydroxides, oxides and chlorides of alkaline earth metals.
Teacher demonstration- Reaction of sodium with chlorine in a fume chamber.
Q/A: Students to predict a similar reaction between potassium and chlorine.
Word and balanced chemical equations for various reactions.
Supervised practice.

Exercise: Completing a table of hydroxides, oxides and chlorides of alkaline earth metals.
Discuss combination of ions of alkaline earth metals with anions.
Sodium, chlorine.
revision book
text book
K.L.B. BOOK II P. 41
K.L.B. BOOK II PP. 45-47
2 1
CHEMICAL FAMILIES
Uses of some alkaline earth metals and their compounds.
Halogens. Physical properties of halogens.
By the end of the lesson, the learner should be able to:
State uses of alkaline earth metals.
Descriptive approach: Teacher elucidates uses of alkaline earth metals.
text book
Iodine crystals, electrical wire, a bulb.
K.L.B. BOOK II PP. 45-47
2 2
CHEMICAL FAMILIES
Comparative physical properties of halogens.
Chemical properties of halogens.
By the end of the lesson, the learner should be able to:
To state and explain the trends in physical properties of halogens.
Examine a comparative table of physical properties of halogens.
Discuss the deductions made from the table.
text book
Chlorine, iron wool, bromine.
K.L.B. BOOK II P. 47
2 3-4
CHEMICAL FAMILIES
Equations of reaction of halogens with metals.
Reaction of halogens with water.
By the end of the lesson, the learner should be able to:
To write balanced chemical equations of reactions involving halogens.
To describe reaction of halogens with water and the results obtained.
Re-write word equations as chemical equations then balance them.
Supervised practice.
Bubbling chlorine gas through water.
Carry out litmus test for the water.
Explain the observations.
text book
Chlorine gas, litmus papers.
K.L.B. BOOK II P. 50
K.L.B. BOOK II P. 51
3 1
CHEMICAL FAMILIES
Some uses of halogens and their compounds.
Noble Gases. Comparative physical properties of noble gases.
Uses of noble gases.
By the end of the lesson, the learner should be able to:
To state uses of halogens and their compounds.
Teacher elucidates uses of halogens and their compounds.
text book
K.L.B. BOOK II pp 52
3 2
STRUCTURE & BONDING
Chemical bonds. Ionic bond.
Ionic bond representation.
Grant ionic structures.
By the end of the lesson, the learner should be able to:
Describe role of valence electrons in determining chemical bonding.


Explain formation of ionic bonding.
Q/A: Review valence electrons of atoms of elements in groups I, II, III, VII and VIII.
Q/A: Review group I and group VII elements.
Discuss formation of ionic bond.
text book
Chart- dot and cross diagrams.
Models for bonding.
Giant sodium chloride model.
K.L.B. BOOK IIP54




PP 57-58
3 3-4
STRUCTURE & BONDING
Physical properties of ionic compounds.
Covalent bond.
Co-ordinate bond.
Molecular structure.
Trend in physical properties of molecular structures.
By the end of the lesson, the learner should be able to:
Describe physical properties of ionic compounds.
Explain the differences in the physical properties of ionic compounds.
To describe the molecular structure.
To give examples of substance exhibiting molecular structure
Analyse tabulated comparative physical properties of ionic compounds.

Teacher asks probing questions.
Discussion ? To explain formation of the giant structure and give examples of substance exhibiting molecular structure.
text book
text book
Sugar, naphthalene, iodine rhombic sulphur.
K.L.B. BOOK IIPP 58-59
K.L.B. BOOK IIP 65
4 1
STRUCTURE & BONDING
Giant atomic structure in diamond.
Giant atomic structure in graphite.
Metallic bond. Uses of some metals.
By the end of the lesson, the learner should be able to:
To describe giant atomic structure in diamond.
To state uses of diamond.
Diagrammatic representation of diamond.
Discuss uses of diamond.
Diagrams in textbooks.
text book
K.L.B. BOOK II P 69
4 2
PROPERTIES AND TRENDS ACROSS PERIOD THREE
Physical properties of elements in periods.
By the end of the lesson, the learner should be able to:




To compare electrical conductivity of elements in period 3
Group experiments- Construct electrical circuits incorporating a magnesium ribbon, then aluminum foil, then sulphur in turns.
The brightness of the bulb is noted in each case.
Discuss the observations in terms of delocalised electrons.
The periodic table.
K.L.B. BOOK IIP. 76
4 3-4
PROPERTIES AND TRENDS ACROSS PERIOD THREE
Physical properties of elements in period 3.
Chemical properties of elements in period 3.
Chemical properties of elements in the third period.
Oxides of period 3 elements.
Chlorides of period 3 elements.
By the end of the lesson, the learner should be able to:
To compare other physical properties of elements across period 3.
To identify bonds across elements in period 3.
To explain chemical behavior of their oxide.
Analyse comparative physical properties presented in form of a table.
Explain the trend in the physical properties given.

Comparative analysis, discussion and explanation.
The periodic table.
K.L.B. BOOK II P. 77
K.L.B. BOOK II P. 84

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