86 Rn
Noble gas
Radon
Radioactive gas from uranium decay.
Properties of Radon
- Atomic number (Z)
- 86
- Symbol
- Rn
- Atomic mass
- 222 g/mol
- Category
- Noble gas
- Group
- 18
- Period
- 6
- Electron configuration
- [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
- Electronegativity (Pauling)
- 2.2
- Atomic radius
- 120 pm
- First ionization energy
- 1037 kJ/mol
- Melting point
- 202 K (-71.1 °C)
- Boiling point
- 211.3 K (-61.8 °C)
- Density
- 0.00973 g/cm³
- Phase at 25 °C
- Gas
- Discovered
- Discovered in 1900
Frequently asked questions
What is Radon?
Radon (Rn) is a noble gas, element number 86 on the periodic table. Radioactive gas from uranium decay.
What is the atomic number and atomic mass of Radon?
Radon has atomic number 86 and an atomic mass of about 222 g/mol.
What is the electron configuration of Radon?
The electron configuration of Radon is [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶.
Where is Radon on the periodic table?
Radon sits in group 18, period 6, and is classified as a noble gas.