Question

Why copper and chromium have
exceptional configuration *​

Answer 1

Answer:

Since chromium had 4 electrons, which is one short of 5 electrons to get just hslf-filled. ... To attain a completely filled electronic configuration copper gains one electron from the d-orbital and attains the electronic configuration of (Ar) d10 4s1. Thus both Cr and Cu have exceptional electronic configuration.

Answer 2

Answer:

U

Explanation:

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