| Atomic no. | Mass no. | Number of neutrons | Number of protons | Number of electrons | Name of atomic species |
| 3 | - | 4 | - | - | - |
| 11 | 23 | - | - | - | Sodium |
| - | 24 | - | 12 | - | - |
| 16 | 32 | - | - | - | Sulphur |
| - | 1 | 0 | 1 | - | - |
Answer:
(a) 7, 3, 3, Lithium
(b) 12, 11, 11
(c) 12, 12, 12, Magnesium
(d) 16, 16, 16
(e) 1, 1, Protium
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