(a) Element X is Sulphur
(b) The electronic configuration of sulphur is written as
Sulphur (Z = 16) = 1s2 2s2 2p6 3s2 3p4 = 2, 8, 6
(c) 2FeSO4(s) + Heat → Fe2O3(s) + SO2(g) + SO3(g)
(d) Sulphur oxides (SO2 and SO3) are acidic in nature.
(e) Group 16 Period 3