Radon

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This editable Main Article is under development and subject to a disclaimer.

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| Radon | 222 |

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| Rn

1s22s22p63s23p63d104s24p6 4d105s25p64f145d106s26p6 |
[ ? ] | Noble gas:

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Hazard:
Radioactive

Radon is a chemical element, having the chemical symbol Rn. Its atomic number (the number of protons) is 86. It has a standard atomic weight of 222 g•mol −1 and is a solid in its elemental form.

Radon is a monatomic noble gas. At a pressure of 101.325 kPa, it has a boiling point of  −71 °C and a melting point of  −61.7 °C.