An atom of aluminum has an atomic number of 13 and a mass number of 27. How many neutrons does it have?
1 Answer
Jul 9, 2016
14 neutrons
Explanation:
The mass number is the total number of protons and neutrons in a nucleus. The atomic number is the number of protons in the nucleus.
With this information it is an easy question:
mass number (p + n) - atomic number (p) = neutrons (n)
