Question

Give values of n and l for an unpaired electron in cu?

Answer 1

Atomic Number 29 (n)
Electronic Configuration : `1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^10`

Explanation:

Remember that copper doesn't fill it's `4s` orbital as it's more energetically favourable for it to fill `3d` first, chromium behaves similarly