Choose the correct answer from the choices A, B, C and D:
(i) The characteristic of a covalent compound is that:
A. they are farmed by the sharing of electrons.
B. they are formed between metals and non-metals.
C. they are formed between two non-metals.
D. they often exist as a liquid.
(ii) When a metal atom becomes an ion
A. it loses electrons and is oxidized,
B. it gains electrons and is reduced,
C. it gains electrons and is oxidized,
D. it loses electrons and is reduced