1.
Element: Helium
Proton: 2
Neutrons: 2
2.
Element: Iron
Proton: 26
Neutrons: 30
3.
Element: Aluminum
Proton: 13
Neutrons: 14
4.
Element: Calcium
Proton: 20
Neutrons: 20
5.
Element: Neon
Protons: 10
Neutrons: 11
6.
Element: Carbon
Protons: 6
Neutrons: 6
7.
Element: Fluorine
Protons: 9
Neutrons: 10
8.
Element: Chlorine
Protons: 17
Neutrons: 18
9.
Element: Sodium
Protons: 11
Neutrons: 11