Consider the ground state of Cu atom (Z = 29). The number of electrons with the azimuthal quantum numbers l=1 and 2 are, respectively,12,5 12,10 16,6 14,8

Options

A. 12,5
B. 12,10
C. 16,6
D. 14,8

Answer

B

Explanation

The electronic configuration of `""_(29)Cu` is `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10) 4s^(1)`
l=1 corresponds to p orbital. The number of electrons in p orbital is 6+6=12
l=2 corresponds to d orbital. The number of electrons in d orbitals is 10