1. In terms of structure and bonding, explain why the melting point of oxygen is much lower than that of sodium.(3 marks)
2. Using dots (.) and crosses (X), show bonding in:
(a)The compound formed when nitrogen reacts with fluorine.(Atomic numbers F= 9, N=7)(2 marks)
(b)Sodium oxide. (Atomic numbers Na = 11, O= 8)

3. The structure of methanoic acid is

What is the total number of electrons used for bonding in a molecule of methanoic acid? Give reasons.

HC