Why is the electronic configuration of chromium and copper difference?

1.	Why is the electronic configuration of chromium and copper difference?
Answer» Explanation: There are TWO main EXCEPTIONS to electron configuration: CHROMIUM and copper. In these cases, a completely FULL or half full d sub-level is more stable than a partially filled d sub-level, so an electron from the 4s ORBITAL is excited and rises to a 3d orbital. give me thanks for answer

Answer»

Explanation:

There are TWO main EXCEPTIONS to electron configuration: CHROMIUM and copper. In these cases, a completely FULL or half full d sub-level is more stable than a partially filled d sub-level, so an electron from the 4s ORBITAL is excited and rises to a 3d orbital.

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Why is the electronic configuration of chromium and copper difference?

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