Question

In which main energy level does the 'd' sublevel first appear?
K (first main energy level)
L (second main energy level)
M (third main energy level)
N (fourth main energy level)

Answer 1

Answer:

N

Explanation:

k=1s=2electrons

L=2s 2p=8 electrons

M=3s 3p=8 electrons

N=4s 3d=...