How can you use the number of electrons in an aluminum atom to determine how many protons and neutrons are in its nucleus?

You use the number of electrons in an aluminum atom to determine how many protons are in its nucleus because the atomic number of aluminum, 13, tells you how many electrons and protons they are. Then you can the  number of neutrons by subtract it's atomic number by its mass, 27, which will result in the number of neutrons, 14.

Explanation:

answer; talc and gypsum;