which is more stable Ni2+ or Fe 3+]
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The electronic configuration pf Fe+3 = [Ar] 3d5. So, as we know that half filled subshells are more stable, Thus we can see that Fe+3 ion will be more stable than Ni+2 , because of more number of exchanges in Half filled subshell.
Explanation:
Ni2+ - [Ar] 3d8 Fe3+ - [Ar] 3d5 See either full filled or half filled orbits are stable. And according to that Fe3+ is more stable. Since it is half filled shell, it is stable
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