Question

To find the number of neutrons we have to subtract Atomicnumber - Mass number

O True
O False

Answer 1

When calculating the number of neutrons you subtract the mass number from the atomic number?

Since the vast majority of an atom's mass is found its 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 the atom. In our example, this is: 14 (atomic mass) – 6 (number of protons) = 8 (number of neutrons).