Half Full d^5 and Full d^10 Subshells
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Half Full d^5 and Full d^10 Subshells
I understand that elements with a half full or full subshell are more stable, but I don't understand when you're allowed to do this. Is it just with elements with a subshell of 3d^4 4s^2, or 3d^9 4s^2, that are able to take an electron from the s-orbital and put it in the d-orbital?
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Re: Half Full d^5 and Full d^10 Subshells
I'm pretty sure the exception applies to any configuration ending in d^4 or d^9. Watch out for chromium and copper!
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Re: Half Full d^5 and Full d^10 Subshells
The only exceptions we are expected to know are Cu and Cr, which in this case would be 4s1 3d5 and 4s1 3d10 respectively.
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Re: Half Full d^5 and Full d^10 Subshells
There would only be an exception for the Co^2- ion which acts like Cu. It's electron configuration would then be [Ar] 3d^10 4s^1.
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