Question

why there are exceptions in confrigation in copper and chromium?explain(•ᴗ•)❤. ​

Answer 1

When doing the electron configurations for these elements, they are exceptions to the general rule because 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.

Answer 2

$\huge\red\star{Answer}\red\star$

When doing the electron configurations for these elements, they are exceptions to the general rule because 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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