Question

What is the electron configuration of Cu+?

Answer 1

Answer:

[Ar] 3d¹⁰ 4s¹

Explanation:

Atomic number: 29

Symbol: Cu

Atomic mass: 63.546 u

Answer 2

Answer:

Cu+ - 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10, 4s^1

Explanation:

Atomic number of Cu is 29.

Thus, its electronic configuration can be written as, Cu29=

1s2 2s2 2p6 3s2 3p6 3d10, 4s^1

(Since, fully filled orbitals are more stable, so one electron from 4s orbital transfers into 3d orbital.)