Question

a region of most probable electron location in an atom is called
a nucleus
b neither the nucleus or orbital ring
c orbital ring
d both the nucleus and the orbital ring

Explanation:

The nucleus contains protons and neutrons, not electrons. An orbital (or orbital ring) is the region where an electron is most likely to be found in an atom. So the correct option is the one related to the orbital ring.

Answer:

C. orbital ring