Which ion has the stable electronic configuration?Ni^(2+) or Fe^(3+).

1.	Which ion has the stable electronic configuration?Ni^(2+) or Fe^(3+).
Answer» Solution :`Ni(Z=28).1S^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(8)` `Ni^(2+)` electronic configuration =`1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(8)` `Fe(Z=26).1s^(2)2s^(2)2p^(6)3s^(6)4s^(2)3d^(6)` `Fe^(3+)1s^(2)2s^(2)2p^(6)3s^(6)3d^(5)` If d ORBITAL is half FILLED,ACCORDING to Aufbau PRINCIPLE,it is more stable.So `Fe^(3+)` is more stable than `Ni^(2+)`

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