Question

these are all the same of, but they are different. (a.) has an atomic mass of. it has proton(s) and neutron(s). (b.) has an atomic mass of. it has proton(s) and neutron(s). (c.) has an atomic mass of. it has proton(s) and neutron(s).

Explanation:

Los isótopos son átomos del mismo elemento químico (misma cantidad de protones) pero con diferente número de neutrones, lo que les da una masa atómica diferente. La masa atómica se calcula sumando la cantidad de protones y neutrones.

Answer:

These are all the same isotopes of hydrogen, but they are different in mass number.
(A.) has an atomic mass of 1. It has 1 Proton(s) and 0 Neutron(s).
(B.) has an atomic mass of 2. It has 1 Proton(s) and 1 Neutron(s).
(C.) has an atomic mass of 3. It has 1 Proton(s) and 2 Neutron(s).