Radon (Rn) — Element 86: Properties & Data | Aladdin Scientific
Radon(Rn) — Element 86
Radon (Rn) is a noble gas with atomic number 86 and atomic mass 222.018. It has melting point 202 K (-71 °C), boiling point 211.45 K (-62 °C), density 0.00973 g/cm³. It sits in group 18 and period 6 of the periodic table and was discovered in 1900.
Key facts
| Atomic mass | 222.0176 u |
|---|---|
| Electron configuration | [Xe]6s2 4f14 5d10 6p6 |
| Atomic radius (van der Waals) | 220 pm |
| Ionization energy | 10.745 eV |
| Melting point | 202 K |
| Boiling point | 211.45 K |
| Density | 0.00973 g/cm³ |
| Standard state | Gas |
| Year discovered | 1900 |
Frequently asked questions
What is the electron configuration of radon?
The ground-state electron configuration of radon is [Xe]6s2 4f14 5d10 6p6.
What group and period is radon in?
Radon (Rn) is in group 18 and period 6 of the periodic table, classified as a noble gas.
What is the melting point of radon?
Radon melts at 202 K (-71 °C).
What is the standard state of radon?
Radon is a gas at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .