Question

To find the atomic mass of a particular atom you need to know
a. the number of protons.
b. the number of neutrons.
c. the number of protons and neutrons.
d. simply what element the atom belongs to.

Answer 1

You just need the number of protons and number of neutrons as the mass of eelctrons is negligible

Answer 2

Answer:

C. the number of protons and neutrons