86Rn
Radon
Noble GasRadon (Rn) is element 86, a noble gas, in period 6 and group 18 of the periodic table. Its atomic mass is usually given as 222, it melts at -71 °C and boils at -61.7 °C. Discovered by Friedrich Ernst Dorn, 1900.
Atomic Number86
SymbolRn
NameRadon
Atomic Weight222 u
CategoryNoble Gas
Period6
Group18
Melting Point-71 °C
Boiling Point-61.7 °C
Density0.00973 g/cm³
Electron Config[Xe] 4f14 5d10 6s2 6p6
Discovered ByFriedrich Ernst Dorn, 1900