Because of small size and high charge density, the first member of every group differs from the rest of members of same group. In the given options, lithium and beryllium differs from other members of group IA and IIA respectively.
Hence, option D is correct.
Because of small size and high charge density, the first member of every group differs from the rest of members of same group. In the given options, lithium and beryllium differs from other members of group IA and IIA respectively.
Hence, option D is correct.