- Element: Helium, Symbol: He, Atomic Number: 2, Atomic Mass: 4.0, Protons: 2, Neutrons: 2, Electrons: 2
- Element: Lithium, Symbol: Li, Atomic Number: 3, Atomic Mass: 7.0, Protons: 3, Neutrons: 4, Electrons: 3
- Element: Boron, Symbol: B, Atomic Number: 5, Atomic Mass: 11.0, Protons: 5, Neutrons: 6, Electrons: 5
- Element: Fluorine, Symbol: F, Atomic Number: 9, Atomic Mass: 19.0, Protons: 9, Neutrons: 10, Electrons: 9
- Element: Iron, Symbol: Fe, Atomic Number: 26, Atomic Mass: 56.0, Protons: 26, Neutrons: 30, Electrons: 26
- Element: Bromine, Symbol: Br, Atomic Number: 35, Atomic Mass: 80.0, Protons: 35, Neutrons: 45, Electrons: 35
- Element: Lead, Symbol: Pb, Atomic Number: 82, Atomic Mass: 207.0, Protons: 82, Neutrons: 125, Electrons: 82
Parent Tip: Review the logic above to help your child master the concept of periodic table protons neutrons and electrons worksheet.