Question

What are the four quantum number of 20th electron of copper?

Answer 1

Answer:

1 Answer. The correct quantum numbers for last electron of Copper (Cu) would be B. n=3,l=2,m=+2,s=−1/2

Explanation:

1 Answer. The correct quantum numbers for last electron of Copper (Cu) would be B. n=3,l=2,m=+2,s=−1/2. if I use B quantum numbers, it is the same with the last electron of zinc.

Answer 2

Explanation:

The electronic configuration of Cu atom is:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰

20th electorn is in 3d orbital,

Hence the quantum numbers are:

n=3 l=2 m= -2,-1,0,1,2 s= +1/2, -1/2