Question:
The +1 oxidation state in group 13 and +2 oxidation state in group 14 becomes more and more stable with increasing atomic number. Explain.
Solution:
Due to the poor shielding of s orbital electrons by d and f orbitals, the tendency of s orbital to form the bond and will decreases down the group from group 13 and 14.
This property is called the inner pair effect. Thus, the +1 oxidation state in group 13 and +2 oxidation state in group 14 becomes more and more stable with increasing
atomic number.