54Xe131.29
Xenon
Noble gas · element 54 · group 18, period 5
Quick facts
| Symbol | Xe |
|---|---|
| Atomic number | 54 |
| Relative atomic mass | 131.29 |
| Category | Noble gas |
| Position | group 18, period 5 |
| State at 20 °C | Gas |
| Melting point | -111.8 °C |
| Boiling point | -108.1 °C |
| Density | 0.006 g/cm³ |
| Electronegativity | 2.6 |
| Electron configuration | [Kr] 4d10 5s2 5p6 |
About Xenon
Xenon has the symbol Xe and atomic number 54, which means every xenon atom has 54 protons in its nucleus and, in a neutral atom, 54 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 -111.8 °C and boils at -108.1 °C.
Explore it
See where xenon sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.