Blue toruses = 21 protons
Red toruses = 11 nuclear electrons
Atomic number of Ne21 = protons (21) - nuclear electrons (11) = 10
Photon and particle model
Light photon modell
| Ne16 | Ne17 | Ne18 | Ne19 | Ne20 | Ne21 | Ne22 |
| H | He | Li | Be | B | C | N | O | F | Ne |
| Na | Mg | Si | S | Ar | Ca | Fe | Ni | Nd | Pb |