Question

Which electrons in a calcium atom belong to the valence?

A) 1s^2
B) 2s^2
C) 2p^6
D) 3s^2
E) 3p^6
F) 4s^2
G) 2s^2 and 2p^6
H) 3s^2 and 3p^6
I) 4s^2 and 3p^6

Answer 1

The valence electrons in a calcium atom are in the 4s and 3p orbitals.

Step-by-step explanation:

The electrons that belong to the valence in a calcium atom are 4s2 and 3p6. This means that the valence electrons in calcium are located in the 4s and 3p orbitals of the atom.