Magnesium has 12 protons. How many electrons are in its third energy level?

A) two
B) four
C) six
D) eight
E) ten

Third Energy Level

The third energy level in an atom is the third shell that surrounds the nucleus, where electrons can be found.

Protons

Positively charged particles found within atomic nuclei that, along with neutrons, define the atomic mass.

Electrons

Subatomic particles with a negative charge, orbiting the nucleus of an atom and involved in chemical bonds and electricity.