Q.45:- Elements A, B, C and D Iwoe atomic numbers 12,19, 29, and 36 respectively. On the basis of electronic configuration, write to which group of the periodic table each element belongs.
Electronic configuration of A (Z = 12)
=1s2 2s2 2p6 3s2
period = 3, Element’s name = Mg block = s, Group = II Electronic configuration of B (Z = 19)
Element’s name = K (potassium)
=1s2 2s2 2p6 3s2 3p6 4s1 n = 4, period = 4 Block = s, Group = I Electronic configuration of C (Z = 29)
=1s2 2s2 2p6 3s2 3p6 3d10 4s1 n – 4, period = 4 Block = d Electronic configuration of D (Z = 36)
=1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 period = 4 Block = p-Block group = 18