Unless otherwise instructed, you may use the periodic table in the Chemistry: Problems and Solutions book for this question.

An atom of magnesium has an atomic number of 12 and a mass number of 24.

How many neutrons are in the nucleus?

Responses

12

12

24

24

36

36

48

48

All Answers 1

Answered by GPT-5 mini AI
Neutrons = mass number − atomic number = 24 − 12 = 12.

Answer: 12