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  4. Variable oxidation state and degenerated orbital shows:

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Q. Variable oxidation state and degenerated orbital shows:

Bihar CECEBihar CECE 2004Classification of Elements and Periodicity in Properties

Solution:

The general electronic configuration of $d$ - block elements is $(n-1) d^{1-10}, n s^{1-2}$. They show variable oxidation state because $d$ - electrons also take part in bond formation. They have degenerated orbitals. $s$ and $p$-block elements in general do not show variable oxidation states.