Page 282 - SUBSEC October 2017_Neat

UNIT 1
MODULE 1: FUNDAMENTALS IN CHEMISTRY (cont’d)

SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES

2. 8. Forces of Attraction

Students should be able to:

2.1. 8.1 state the various forces of Ionic bonds, covalent
attraction between bonds, hydrogen bonds,
particles; metallic bonds, Van der
Waals forces. (Permanent-
permanent dipole;
induced-induced dipole or
temporary/instantaneous-
induced dipole).

2.2. 8.2 state the relationship
between forces of
attraction and states of
matter;

2.3. 1.1 relate physical properties Variation in melting points, Conduct melting point
of matter to differences in boiling points and and boiling point
strength of forces of solubilities. determinations;
attraction; solubilities in polar and
non-polar solvents,
electrical conductivity.
Illustrate practically the
properties of ionic and
covalent compounds.

2.4. 8.3 explain the formation of Covalent bonds should be
the following: discussed in terms of
orbital overlap which
(a) ionic bonds; results in the formation of
sigma (σ) and pi (π) bonds.
(b) covalent bonds; and, Metallic bonding is to be
treated as a lattice of
(c) metallic bonds. positive ions surrounded
by mobile electrons.
Electronegativity and
polarity of bonds should be
included.

2.5. describe co-ordinate Use 'dot-cross’ diagrams;
(dative covalent) bonding; refer to simple systems (for
example, BF3/NH3).

CXC A11/U2/17 13