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

Explanation

In transition elements, the oxidation state can vary from +1 to the highest oxidation state by removing all its valence electrons. Also, in transition elements, the oxidation states differ by 1 (`Fe^(2+)` and `Fe^(3+), Cu^(+)` and `Cu^(2+)`). In non-transition elements, the oxidation states differ by 2, for example, +2 and +4 or +3 and +5, etc.