Anomalous Properties of Second Period Elements
Their anomalous behaviour is attributed to their small size, large charge / radius ratio, high electro negativity, non- availability of d- orbitals in their valence shell. the first member of each group of p-Block elements displays greater ability to form pp-pp multiple bonds to itself( e. g. C = C, C≡C O = O, N≡N) and to other second period elements( e. g. C = O, C≡N, N = O) compared to subsequent member of the group.