| A | B |
|---|
| Hydrogen | 1proton 0neutrons 1electron |
| Helium | 2protons 2neutrons 2electrons |
| Lithium | 3protons 4neutrons 3electron |
| Beryllium | 4protons 5neutrons 4electrons |
| Boron | 5protons 6neutrons 5electrons |
| Carbon | 6protons 6neutrons 6electrons |
| Nitrogen | 7protons 7neutrons 7electrons |
| Oxygen | 8protons 8neutrons 8electrons |
| Fluorine | 9protons 10neutrons 9electrons |
| Neon | 10protons 10neutrons 10electrons |
| Sodium | 11protons 12neutrons 11electrons |
| Magnesium | 12protons 12neutrons 12electrons |
| Aluminium | 13protons 14neutrons 13electrons |
| Silicon | 14protons 14neutrons 14electrons |
| Phosphorus | 15protons 16neutrons 15electrons |
| Sulfur | 16protons 16neutrons 16electrons |
| Chlorine | 17protons 18neutrons 17electrons |
| Argon | 18protons 22neutrons 18electrons |
