1.

The number of unpaired electrons in Ce ^(3+) ion is 0

Answer»

0
1
2
3

Solution :We KNOW that, `Ce ^(3+)` ion has electronic confiugration `6S^(0), 4f^(1), 5d^(0)` hence it contains 1 unpaired ELECTRONS. From +3 oxidation state of cerium it is clear that Ce has electronic configuration `6s^(2), 4f^(2), 5d^(0).`


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