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Complete the Table 8.5:
| Atomic number | Mass number | Number of neutrons | Number of protons | Number of electrons | Name of the elements |
|---|---|---|---|---|---|
| 5 | – | 6 | – | – | – |
| – | 14 | – | – | 7 | Nitrogen |
| – | 24 | – | 12 | – | – |
| 15 | – | 16 | – | – | – |
| – | 1 | 0 | – | – | – |
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| Atomic number | Mass number | Neutrons | Protons | Electrons | Element |
|---|---|---|---|---|---|
| 5 | 11 | 6 | 5 | 5 | Boron |
| 7 | 14 | 7 | 7 | 7 | Nitrogen |
| 12 | 24 | 12 | 12 | 12 | Magnesium |
| 15 | 31 | 16 | 15 | 15 | Phosphorus |
| 1 | 1 | 0 | 1 | 1 | Hydrogen |
Use Z = protons = electrons, A = protons + neutrons, and neutrons = A − Z.
Using the Table
Atomic number equals number of protons Mass number equals protons plus neutrons Neutrons equal A minus Z Protons equal electrons (neutral atom)
