Atomic number is the proton
- Atomic number is protons
- Atomic number is protons and electrons
- Is atomic number protons or neutrons
- Atomic number is protons plus neutrons
- Atomic number is proton or neutron
- Atomic number is the same as protons
- Atomic number is the number of protons in an atom
- Atomic number protons electrons and neutrons
- Is the atomic number equal to the number of protons
- Atomic number is how many protons
- Is proton number equal to atomic number
- Atomic mass number is protons
- Atomic number equals protons
- Atomic number mass protons neutrons electrons
- Atomic number 11 protons and 12 neutrons