| No. | Element | Atomic Number | Mass Number | Protons | Neutrons | Electrons |
|---|---|---|---|---|---|---|
| 1 | Sodium (Na) | 11 | 23 | 11 | 12 | 11 |
| 2 | Oxygen (O) | 8 | 16 | 8 | 8 | |
| 3 | Magnesium (Mg) | 24 | 12 | 12 | 12 | |
| 4 | Aluminium (Al) | 13 | 27 | 14 | 13 | |
| 5 | Neon (Ne) | 20 | 10 | 10 | ||
| 6 | Nitrogen (N) | 7 | 7 | 7 | 7 | |
| 7 | Chlorine (Cl) | 35 | 17 | 18 | ||
| 8 | Sulphur (S) | 16 | 32 | 16 | 16 | 16 |