Mendeleev's Periodic Table > Rg - Roentgenium

Rg - Roentgenium

Element 111, roentgenium, was discovered on 8th December 1994 at the GSI in Darmstadt, Germany.

Atomic number - 111 Density g/mL -
Atomic weight u 272 Melting point K -
Bonding radius A - Boiling point K -
Atomic radius A - Heat of vaporization kJ/mol -
Ionization Potential V - Heat of fusion kJ/mol -
Electronegativity - - Specific heat J/gK -
The oxide is unknown. Crystal are unknown.
Electron config. : [Rn] 5f14 6d10 7s1

Isotopes of Rg (Roentgenium) :

MASS abundancy
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass		 272
2 msec
a,10.82 MeV
Mt-268
272


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