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Radon

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

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Physical data
Isotopes
Other info
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Physical data

Electronic dataThermal dataSteric 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: --
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
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
cubic face centered

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
211Rn 0 210.991 1/2 14.6h EC, β+, α View
212Rn 0 211.991 0 24m α View
217Rn 0 217.004 9/2 0.6ms α View
218Rn 0 218.006 0 35ms α View
219Rn 0 219.01 5/2 3.96s α View
220Rn 0 220.011 0 55.61s α View
222Rn 0 222.018 0 3.824d α View

Other info

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.