Question

Suppose you know the number of protons in an atom. What other information would you need in order to determine the mass of the atom? Explain your reasoning

Answer 1

The number of neutrons because the number of neutrons plus the number of protons equals the atomic mass

Answer 2

Well for starters atomic mass can be calculated by adding the number of proton and neutrons together. Therefore if you already have the number of protons then the missing information would be the amount of neutrons.