Question

Electronic configuration of cu metal ( z=29) and cr3+ ion

Answer 1

Cu = 1s^2 , 2s^2 , 2p^6 , 3s^2 , 3p^6 , 4s^1 , 3d^10.

Cr^3+ = 1s^2 , 2s^2 , 2p^6 , 3s^2 , 3p^6 , 3d^3