Radon
Radon
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Radon ΒΆ
AtomicNumber: 86
Element: Radon
Symbol: Rn
AtomicMass: 222.0
NumberofNeutrons: 136
NumberofProtons: 86
NumberofElectrons: 86
Period: 6
Group: 18.0
Phase: gas
Radioactive: yes
Natural: yes
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Alkali Metal
AtomicRadius: 1.3
Electronegativity: nan
FirstIonization: 10.7485
Density: 0.00973
MeltingPoint: 202.15
BoilingPoint: 211.3
NumberOfIsotopes: 20.0
Discoverer: Dorn
Year: 1900.0
SpecificHeat: 0.094
NumberofShells: 6
NumberofValence: 8.0