General

Roentgenium (Rg) properties


Atomic mass, symbol and atomic number

Roentgenium is an artificially created element with the element symbol Rg and the atomic number 111. In the periodic table it belongs to the transactinoids with an atomic mass of 280 u. The chemical element discovered in 1994 is radioactive and is in a solid state of aggregation at room temperature.

Characteristics: Roentgenium (English: Roentgenium)

General
Chemical element:Roentgenium
Symbol:rg
Atomic number:111
Group:copper group
Period:7
Block:d-block
Series:unknown
Appearance:unknown
explorers:Society for Heavy Ion Research (GSI) - Darmstadt
Year of discovery:1994
Atomic properties
Atomic mass:280 u
Atomic radius:114 pm
Covalent radius:121 pm
Van der Waals radius:unknown
Electron configuration:Rn 5f14 6d10 7s1
ionization:unknown
Physical Properties
Physical state:firmly
Density:???
Crystal structure:unknown
Magnetism:unknown
molar volume:unknown
Mohs hardness:unknown
Melting point:unknown
Boiling point:unknown
Heat of fusion:unknown
Heat of vaporization:unknown
Thermal conductivity:unknown
Chemical properties
electronegativity:unknown

Did you know that ...

  • Roentgenium was named in honor of the German physicist Wilhelm Conrad Röntgen?
  • the longest lived Roentgenium isotope does not even have a half life of 4 sec?
  • Roentgenium belongs to the transactinoids?