The position of three elements A, B and C in the Periodic Table are shown below –
`{:(Group 16, Group 17),( -, -),( -, A),( - ,-),( B ,C):}`
(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 A?

Explanation

(A) a is non metal.
(b) C is less reactive than A, as reactivity decreases down the group in halogens.
(c ) C will be smaller in size than B as moving across a period ,the nuclear charge increases and therefore electrons come closer to the nucleus.
(d) A will form an anion as it accepts an electron to complete its octet.