In the ground state, the atom is neutral, which means it has the same number of protons and electrons.
- If the atom has 30 protons and it is neutral, the number of electrons in this atom is 30.
- To find the atomic mass, it is necessary to do the following calculation:
A = p + n
where:
A = atomic mass
p = number of protons
n = number of neutrons
For this element:
A = 30 + 34
A = 64
So the atomic mass of this element is 64.
