1.

How many unpaired electorns are present in the ground state of(i)Cr^(2+)(Z=24)(ii)Ne(Z=10)

Answer»

Solution :(i)`Cr(Z=24)``1S^(2)2s^(2)2p^()3s^(2)3p^(6)3d^(5)4s^(1)`
`Cr^(3+)-1s^(2)2s^(2)2p^()3s^(2)3p^(6)3d^(4)`
It CONTAINS 4 UNPAIRED electrons.
(ii)Ne(Z=10)`1s^(2)2s^(2)2p^(6)`.No unpaired electrons in it.


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