The +1 oxidation state in group 13 and +2 oxidation state in group 14 becomes more and more stable with increasing atomic number. Explain.
The group 13 and 14, on going down a group, the energy to form bonds decreases. This is given the weak shielding of the s-electrons and the interference by the d-electrons. The inert pair effect arises, and thus the s-electrons, especially of groups 13 and 14, don’t indulge in bonding and the oxidation states of group 13 and 14 become stable due to an increase in atomic number.