How is the variability in oxidation states fo transition metals different from that of the non transition metaals?
Illustrate with examples.

Explanation

The transition metals shows a number of variable oxidation states due to the participation of (n-1)d electrons in addition to ns electrons in the bond formation. They therefore, exhibiti a large number of variable oxidation states. On the other hand, the non-transition metals generally belonging to s- block do not show variable oxidation state because by the loss of valence s-electrons, they acquire the configuration of the nearest gas elements.