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

Explanation

In the case of transition metls, the oxidation states differ from each other by unity, whereas in the case of non-transition metals oxidation states usually differ by two units.
`{:("Transition metals","Non-transition metals"),("Fe : +2, +3","Sn : +2, +4"),("Cu : +1, +2","Pb : +2, +4"):}`