Question

What is the electron configuration for Co?

Answer 1

\[ \color{green}{1s^2~2s^22p^6~3s^23p^6 ~4s^23d^7}\]

Answer 2

How many subshells are there in the n = 4 principal shell?
A.1
B.3
C.2
D.4
E.not enough information

Answer 3

@ghuczek

Answer 4

When n = 4 there are four subshells: s, p, d and f