Page 299 - SUBSEC October 2017_Neat

UNIT 1
MODULE 3: CHEMISTRY OF THE ELEMENTS (cont’d)

SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES

Period 3: Sodium to Argon cont’d

Students should be able to:

1.6. predict the types of Refer to differences in
chemical bonding present electronegativities and ionic
in the chlorides and oxides; radii of the elements.
and,

1.7. 1.6 discuss the uses of some of Limited to the use of
the compounds of aluminium hydroxide in
aluminium and antacid medication, white
phosphorous. phosphorous used in flares
and military applications,
red phosphorous used at
the side of match boxes and
argon used in fluorescent
and incandescent lighting.

2. Group II Elements

Students should be able to:

2.1. 1.1 explain the variations in Include reference to atomic
properties of the elements and ionic radii and
in terms of structure and ionisation energies.
bonding;

2.2. 1.7 describe the reactions of Include equations.
the elements with oxygen,
water and dilute acids;

2.3. 1.1 explain the variation in the Qualitative treatment only
solubility of the sulfates; is required. Simple
explanations in terms of
lattice and hydration
energies.

2.4. 1.8 explain the variation in the Include equations.
thermal decomposition of
the carbonates and
nitrates; and,

2.5. 1.9 discuss the uses of some of Limited to the use of
the compounds of magnesium oxide, calcium
magnesium and calcium. oxide, calcium hydroxide
and calcium carbonate.

CXC A11/U2/17 30