Radon (Rn)
Radon
Radon (Rn) is a noble gas in period 6, group 18. Its relative atomic mass is [222] and the molar mass of the atom is [222] g/mol.
Atomic number 86
Atomic mass [222] predicted
Molar mass [222] g/mol
Category Noble gas Gas
Properties of radon
| Atomic number | 86 |
|---|---|
| Symbol | Rn |
| Latin name | Radon |
| Relative atomic mass | [222] |
| Molar mass | [222] g/mol |
| Group, period, block | 18, 6, p |
| Category | Noble gas |
| State at 20 °C | Gas |
| Electron configuration | [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶ |
Electron configuration of radon
Electrons per shell
K2L8M18N32O18P8
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶
Noble-gas notation
86 protons · 86 electrons[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
Formula and compounds of radon
Simple substanceRnradonMolar mass of Rn: [222] g/mol
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Frequently asked questions
The relative atomic mass of radon is [222], so the molar mass of the atom is [222] g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶. Noble-gas notation: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶.