- The atomic number (number of protons) for each element is found on the periodic table.
- The number of neutrons is calculated by subtracting the atomic number from the mass number (rounded to the nearest whole number).
- For a neutral atom, the number of electrons equals the number of protons.
- Using these rules, fill in the table:
- Boron: Protons = 5, Neutrons = 6, Electrons = 5
- Sodium: Protons = 11, Neutrons = 12, Electrons = 11
- Oxygen: Protons = 8, Neutrons = 8, Electrons = 8
- Iron: Protons = 26, Neutrons = 30, Electrons = 26
- Platinum: Protons = 78, Neutrons = 117, Electrons = 78
- Carbon: Protons = 6, Neutrons = 6, Electrons = 6
- Calcium: Protons = 20, Neutrons = 20, Electrons = 20
- Argon: Protons = 18, Neutrons = 22, Electrons = 18
- Mercury: Protons = 80, Neutrons = 121, Electrons = 80
Parent Tip: Review the logic above to help your child master the concept of proton electron neutron worksheet.
