The position of three elements A, B and C in the periodic Table is shown below:

(a) State whether A is a metal or non-metal
(b) State whether C is more reactive or less reactive than A
( c) Will C be larger or smaller in size than B?
(d) Which type of ion, cation or anion, will be formed by element C?

Explanation

C is less reactive than A, as reactivity decrease down the group in halogens.