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This lesson covers the Group 0 elements (the noble gases) as required by the Edexcel GCSE Chemistry specification (1CH0), Topic 6: Groups in the Periodic Table. You need to understand why the noble gases are unreactive, know their key physical properties and trends, and recall their uses.
Group 0 is found on the far right of the periodic table. These elements are called the noble gases because they are extremely unreactive — they rarely form compounds with other elements.
| Element | Symbol | Atomic Number | Electron Configuration | Boiling Point (°C) |
|---|---|---|---|---|
| Helium | He | 2 | 2 | −269 |
| Neon | Ne | 10 | 2, 8 | −246 |
| Argon | Ar | 18 | 2, 8, 8 | −186 |
| Krypton | Kr | 36 | 2, 8, 18, 8 | −153 |
| Xenon | Xe | 54 | 2, 8, 18, 18, 8 | −108 |
The noble gases have full outer electron shells:
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