Question

A neutral atom has the atomic number of 10 and the atomic mass is 22 amu. what is the number of neutrons and electrons for this atoms?

Answer 1

Hey there!

This atom has 10 protons.

If this atom has an atomic mass of 22, that means the sum of protons and neutrons is 22.

p + n = 22

p = 10

Which makes this true:

10 + n = 22

Subtract 10 from each side to solve for n, the number of neutrons.

n = 12

An atom that has the atomic number of 10 and an atomic mass of 22 has 12 neutrons.

Hope this helps!