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Chemistry
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TERM II
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
2 1
CHEMICAL FAMILIES
Alkali metals. Atomic and ionic radii of alkali metals
By the end of the lesson, the learner should be able to:





Identify alkali metals.
State changes in atomic and ionic radii of alkali metals.

Q/A to reviews elements of group I and their electronic configuration.
Examine a table of elements, their symbols and atomic & ionic radii.
Discussion & making deductions from the table.
The periodic
K.L.B. BOOK IIPP 28-29
2 2
CHEMICAL FAMILIES
Ionisation energy of alkali metals.
Physical properties of alkali metals.
By the end of the lesson, the learner should be able to:
State changes in number of energy levels and ionisation energy of alkali metals.
Examine a table of elements, number of energy levels and their ionization energy.
Discuss the trend deduced from the table.
text book
Chart ? comparative properties of Li, Na, K.
K.L.B. BOOK II
2 3
CHEMICAL FAMILIES
Chemical properties of alkali metals.
By the end of the lesson, the learner should be able to:
To describe reaction of alkali metals with water.
Q/A: Review reaction of metals with water.
Writing down chemical equations for the reactions.
Deduce and discuss the order of reactivity down the group.
text book
K.L.B. BOOK IIP. 32
2 4
CHEMICAL FAMILIES
Reaction of alkali metals with chlorine gas.
By the end of the lesson, the learner should be able to:
To write balanced equations for reaction of alkali metals with chlorine gas.
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.
Sodium, chlorine.
K.L.B. BOOK IIP. 33
3 1
CHEMICAL FAMILIES
Compounds of alkali metals.
By the end of the lesson, the learner should be able to:
Write chemical formulae for compounds of alkali metals.
Explain formation of hydroxides, oxides and chlorides of alkali metals.
Exercise: Completing a table of hydroxides, oxides and chlorides of alkali metals.
Discuss combination of ions of alkali metals with anions.
text book
K.L.B. BOOK II pp 33
3 2
CHEMICAL FAMILIES
Uses of alkali metals.
Alkaline Earth metals Atomic and ionic radii of alkaline earth metals.
By the end of the lesson, the learner should be able to:
State uses of alkali metals.
Descriptive approach: Teacher elucidates uses of alkali metals.
text book
Some alkaline earth metals.
K.L.B. BOOK II pp 34
3 3
CHEMICAL FAMILIES
Physical properties of alkaline earth metals.
By the end of the lesson, the learner should be able to:
State and explain trends in physical properties of alkaline earth metals.
Examine a table showing comparative physical properties of Be, Mg, Ca.
Q/A: Teacher asks probing questions as students refer to the table for answers.
Detailed discussion of physical properties of alkaline earth metals.
Some alkaline earth metals.
K.L.B. BOOK II P. 35
3 4
CHEMICAL FAMILIES
Electrical properties of alkaline earth metals.
By the end of the lesson, the learner should be able to:
To describe electrical properties of alkaline earth metals.
Teacher demonstration: -
To show alkaline metals are good conductors of electric charge.
Alkaline earth metals.
K.L.B. BOOK IIP. 37
4 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
4 2
CHEMICAL FAMILIES
Chemical properties of alkaline earth metals. Reaction of alkaline earth metals with water.
Reaction of alkaline earth metals with chlorine gas.
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.
Sodium, chlorine.
K.L.B. BOOK IIP. 39
4 3
CHEMICAL FAMILIES
Reaction of alkaline earth metals with dilute acids.
By the end of the lesson, the learner should be able to:
To write balanced equations for reactions of alkaline earth metals with dilute acids.
Changing word to chemical equations.
Supervised practice.
revision book
K.L.B. BOOK II PP. 43
4 4
CHEMICAL FAMILIES
Chemical formulae of alkaline earth metals.
By the end of the lesson, the learner should be able to:
Write chemical formulae for compounds of alkaline earth metals.
Explain formation of hydroxides, oxides and chlorides of alkaline earth metals.
Exercise: Completing a table of hydroxides, oxides and chlorides of alkaline earth metals.
Discuss combination of ions of alkaline earth metals with anions.
text book
K.L.B. BOOK II PP. 45-47
5 1
CHEMICAL FAMILIES
Uses of some alkaline earth metals and their compounds.
Halogens. Physical properties of halogens.
Comparative 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
5 2
CHEMICAL FAMILIES
Chemical properties of halogens.
By the end of the lesson, the learner should be able to:
To describe laboratory preparation of chlorine gas.

To describe reaction of halogens with metals.
Teacher demonstration: - preparation of chlorine gas.
Reaction of chlorine and iron wool.
Reaction of bromine and iron wool.
Reaction of iodine and iron wool.
Observe the rate of these reactions; hence deduce order of their reactivity of halogens.
Chlorine, iron wool, bromine.
K.L.B. BOOK IIPP. 48-50
5 3
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.
Re-write word equations as chemical equations then balance them.
Supervised practice.
text book
Chlorine gas, litmus papers.
K.L.B. BOOK II P. 50
5 4
CHEMICAL FAMILIES
Some uses of halogens and their compounds.
Noble Gases. Comparative physical properties 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
6 1
CHEMICAL FAMILIES
STRUCTURE & BONDING
STRUCTURE & BONDING
Uses of noble gases.
Chemical bonds. Ionic bond.
Ionic bond representation.
By the end of the lesson, the learner should be able to:
State uses of noble gases.
Teacher elucidates uses of noble gases.
text book
Chart- dot and cross diagrams.
Models for bonding.
K.L.B. BOOK IIP. 54
6 2
STRUCTURE & BONDING
Grant ionic structures.
Physical properties of ionic compounds.
Covalent bond.
By the end of the lesson, the learner should be able to:
Describe the crystalline ionic compound.
Give examples of ionic substances.
Discuss the group ionic structures of NaCl.
Teacher gives examples of other ionic substances: KNO3, potassium bromide, Ca (NO3)2, sodium iodide.
Giant sodium chloride model.
text book
K.L.B. BOOK II PP 56-58
6 3
STRUCTURE & BONDING
Co-ordinate bond.
Molecular structure.
Trend in physical properties of molecular structures.
By the end of the lesson, the learner should be able to:
To describe the co-ordinate bond
To represent co-ordinate bond diagrammatically.
Exposition- teacher explains the nature of co-ordinate bond.
Students represent co-ordinate bond diagrammatically.
text book
Sugar, naphthalene, iodine rhombic sulphur.
K.L.B. BOOK II P 65
6 4
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
7 1
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
7 2
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.
By the end of the lesson, the learner should be able to:
To compare other physical properties of elements across period 3.
Analyse comparative physical properties presented in form of a table.
Explain the trend in the physical properties given.
The periodic table.
K.L.B. BOOK II P. 77
7 3
PROPERTIES AND TRENDS ACROSS PERIOD THREE
Oxides of period 3 elements.
Chlorides of period 3 elements.
By the end of the lesson, the learner should be able to:
To identify bonds across elements in period 3.
To explain chemical behavior of their oxide.
Comparative analysis, discussion and explanation.
The periodic table.
K.L.B. BOOK II P. 84
9-14

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