Question

The atomic number of magnesium is 12. This means that its nucleus must contain

A) 6 protons and 6 neutrons.
B) 6 neutrons and 6 electrons.
C) 12 neutrons and no protons.
D) 12 protons and no electrons.

Answer 1

D took test c:

*have a great day/evening c: *

Answer 2

The correct answer is D) 12 protons and no electrons. This is correct because the number of protons in the nucleus of the atom is 12. The number of protons in the nucleus represents the atomic number. Therefore if there are 12 protons in the nucleus, the atomic number is 12.