Question

How to calculate mass number of an atom

Answer 1

Count the number of protons and neutrons of an atom in a nucleus. Then, add them to find the number of nucleons. The number of nucleons you got is actually the mass number of an atom.

Answer 2

to calculate mass of an atom follow the below steps:
1. mass of 6.022×10 raised to 23 = mass of an atom(1.66×10 raised to -24)
2. mass of 1 atom = mass of an atom(1.66×10 raised to -24) ÷ 6.022×10 raised to 23
3. solve and get answer.
4. should not put any units because it is mass.
Hope you got it.