Chemical element · Atomic number 86
Radon
Radon in the periodic table: atomic number 86, electron configuration, atomic mass, physical data, oxidation states, media credit and visible sources.
Noble gas
gaseous
[222.01758] u
A locally stored, license-verified sample photograph has not been curated yet.
Atomic classification
Shell occupancy
Radon in the Bohr shell model
This shows the electron distribution of the neutral atom in a simplified shell model.
- K · n=1
- 2 electrons
- L · n=2
- 8 electrons
- M · n=3
- 18 electrons
- N · n=4
- 32 electrons
- O · n=5
- 18 electrons
- P · n=6
- 8 electrons
- Electron configuration
- [Xe]6s2 4f14 5d10 6p6
- Electrons per shell
- 2 · 8 · 18 · 32 · 18 · 8
- Group
- 18
- Period
- 6
- Block
- P
- Element category
- Noble gas
Go from looking up chemistry to remembering it.
Turn your notes into source-backed study cards and review them at the right time.
Starter stays free · no payment details
Physical and chemical properties
- Atomic mass
- [222.01758] u
- Standard state
- gaseous
- Density
- 0.00973 g/cm³
- Melting point
- 202 K
- Boiling point
- 211.45 K
- Electronegativity
- not reported
- First ionisation energy
- 10.745 eV
- Oxidation states
- 0
- Discovery
- 1900
Safety and periodic classification
Safety
Safe handling cannot be inferred from Radon's position in the periodic table alone. Laboratory, classroom and disposal decisions must follow the documentation for the exact material and its safety data sheet.
Position and comparison
Radon is in period 6, group 18 and the P block. Its direct neighbours by atomic number are Astatine and Francium. The snapshot does not report a Pauling electronegativity. Periodic trends are compared only through the separately sourced neighbouring values.
Sources and scope
PubChem attributes element data to sources including IUPAC, NIST and IAEA. Quanta stores the referenced snapshot locally and leaves unknown values unavailable.