86Rn222
Radon
Noble gas · element 86 · group 18, period 6
Quick facts
| Symbol | Rn |
|---|---|
| Atomic number | 86 |
| Relative atomic mass | 222 |
| Category | Noble gas |
| Position | group 18, period 6 |
| State at 20 °C | Gas |
| Melting point | -71 °C |
| Boiling point | -61.7 °C |
| Density | 0.01 g/cm³ |
| Electronegativity | 2.2 |
| Electron configuration | [Xe] 4f14 5d10 6s2 6p6 |
About Radon
Radon has the symbol Rn and atomic number 86, which means every radon atom has 86 protons in its nucleus and, in a neutral atom, 86 electrons. At room temperature it is a gas.
Noble gases are in group 0. They have a full outer shell of electrons, so they are very unreactive and exist as single atoms.
It melts at -71 °C and boils at -61.7 °C.
Explore it
See where radon sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.