Write the electronic configuration of `Cu^(+) and Cr^(2+)` ions (atomic number of Cu, and Cr are 29 and 24 respectively).

Explanation

`Cu^(+):1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)`
`Cr^(2+):1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)d^(4)`.