- Sodium: Symbol Na, Protons 11, Neutrons 13, Electrons 11, Valence Electrons 1, Period 3
- Yttrium: Atomic Number 39, Protons 39, Neutrons 50, Valence Electrons 3, Period 5
- Copper: Symbol Cu, Mass Number 64, Protons 29, Electrons 29, Valence Electrons 1, Period 4
- Technetium: Symbol Tc, Atomic Number 43, Neutrons 55, Electrons 43, Valence Electrons 7, Period 5
- Lead: Symbol Pb, Atomic Number 82, Protons 82, Neutrons 125, Valence Electrons 4, Period 6
- Thallium: Symbol Tl, Protons 81, Neutrons 123, Electrons 81, Valence Electrons 3, Period 6
- Hydrogen: Atomic Number 1, Mass Number 1, Protons 1, Electrons 1, Valence Electrons 1, Period 1
- Carbon: Symbol C, Atomic Number 6, Protons 6, Neutrons 6, Valence Electrons 4, Period 2
- Nitrogen: Symbol N, Atomic Number 7, Mass Number 14, Neutrons 7, Electrons 7, Valence Electrons 5, Period 2
- Barium: Symbol Ba, Atomic Number 56, Mass Number 137, Protons 56, Valence Electrons 2, Period 6
- Calcium: Symbol Ca, Atomic Number 20, Mass Number 40, Protons 20, Neutrons 20, Electrons 20, Valence Electrons 2, Period 4
- Silicon: Symbol Si, Atomic Number 14, Mass Number 28, Protons 14, Valence Electrons 4, Period 3
Parent Tip: Review the logic above to help your child master the concept of protons neutrons electrons worksheet.
