Question

How do you figure out the # of
neutrons?

Answer 1

Subtract Protons

Step-by-step explanation:

Since the vast majority of atom's mass is found it's protons and neutrons, Subtracting the Number of Protons ( i.e. the atomic number ) from the atomic mass will give you the calculated number of neutrons in a atom,

Answer 2

Subtracting the number of protons from the atomic mass.