Question

How many neutrons are integer element oxygen when the atomic mass is 16?

Answer 1

Answer: 8

EXPLANATION:

atomic number = No. of protons

mass number or atomic mass = no. of protons + no. of neutrons

For oxygen atom, we know its atomic number is 8. So, no. of protons is 8 and we are given the atomic mass is 16.

use the equation above,

16 = 8 + no. of neutrons

no. of neutrons = 16 - 8 = 8.