Radon

Non-Metal

Symbol: Rn
Atomic number: 86
Atomic mass: (222.0176)
Group: Noble Gas
CAS-number: 10043-92-2

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Electronic data

Shells: 2, 8, 18, 32, 18, 8
Orbitals: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶
Electronegativity: --, 2.06
1. Ionization potential: 10.7485 eV
2. Ionization potential: -- eV
3. Ionization potential: -- eV
Oxidation states: 2
Electrical conductivity: --

Thermal data

Melting point: -71 °C
Boiling point: -61.8 °C
Specific heat: 0.09 J/gK
Heat of fusion: 2.890 kJ/mol
Heat of vaporization: 16.40 kJ/mol
Thermal conductivity: 0.0000364 W/cmK

Steric data

Atomic radius: 1.34 Å
Ionic radius: -- Å
Covalent radius: -- Å
Atomic volume: 50.5 cm³/mol
Density (293 K): 0.00973 g/cm³
Crystal structure: cubic face centered

Nuclide	Mass	Spin	Halflife	Decay mode	Decay tree
²¹¹Rn	210.991	1/2	14.6h	EC, β+, α	View
²¹²Rn	211.991	0	24m	α	View
²¹⁷Rn	217.004	9/2	0.6ms	α	View
²¹⁸Rn	218.006	0	35ms	α	View
²¹⁹Rn	219.01	5/2	3.96s	α	View
²²⁰Rn	220.011	0	55.61s	α	View
²²²Rn	222.018	0	3.824d	α	View

Name origin:	Variation of the name of another element, radium.
Description:	Colorless, odorless, tasteless, radioactive, heavy, noble gas.
Discovered by:	Fredrich Ernst Dorn
Year:	1898
Place:	Germany
Sources:	Formed from the decay of radium in the earths crust.
Use(s):	Used to treat some forms of cancer.

Radon

Physical data

Electronic data

Thermal data

Steric data

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