Explain the following : (a) Transition elements show variable oxi… - Vidyadip

Question

Explain the following :
(a) Transition elements show variable oxidation states.
(b) The paramagnetic character in $3 d$ transition series elements increases upto Mn and then decreases.

✓

Answer

(a) Transition metals have two orbitals to accommodate their valency electron. The difference in energy between 2-orbital is very less and both can be used for bond formation. $s$-orbital can be used up to +2 oxidation state and $d$-orbital is used for higher oxidation.
(b) In $3 d$ transition series the number of unpaired electrons increases up to Mn and then decreases.

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