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This lesson covers Group 0 of the periodic table — the noble gases — as required by AQA GCSE Chemistry specification (5.1.2). The noble gases are unique because they are the most unreactive elements known. Their lack of reactivity is directly linked to their electronic structure, specifically their full outer electron shells.
Group 0 contains the following elements:
| Element | Symbol | Atomic Number | Electronic Configuration | Boiling Point (degrees 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 |
| Radon | Rn | 86 | (radioactive) | -62 |
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