Symbol Rg
Atomic Number 111
Atomic Mass 280 amu
Discovered by Peter Armbruster and Gottfried Münzenberg in 1994

Chemical Properties of Roentgenium

Group 11 Melting point Unknown
Period 7 Boiling point Unknown
Block d Density (g cm−3) Unknown
Atomic number 111 Relative atomic mass [280]
State at 20°C Solid Key isotopes 280Rg
Electron configuration [Rn] 5f146d107s1 CAS number 54386-24-2
ChemSpider ID ChemSpider is a free chemical structure database

What is Roentgenium?

  • Roentgenium(Rg) is a radioactive element created artificially (extremely radioactive synthetic element) and not found in nature.
  • The element was discovered by Peter Armbruster and Gottfried Münzenberg in the year 1994.
  • It is a D-block transactinide element in the periodic table.

Uses of Roentgenium

  • The element can be used as a synthetic metal within average quantities.
  • It is mainly used for research purposes at present.

Properties of Roentgenium

  • The element has a metallic gold (yellow solid) appearance.
  • The element has around 7 isotopes whose half-lives are known, with mass numbers from 272 to 282.
  • One of the isotopes of this element (218Rg) has a half-life of 26 seconds.
  • The element undergoes decay under spontaneous fission process.

Certain Facts About Roentgenium

  • The element was named after Wilhelm Röntgen (founder of X-rays).
  • It was synthesized for the first time by Hofmann and Sigurd at the Institute for Heavy Ion Research in Germany in the year 1994.
  • The element can be formed artificially by bombarding the ions of bismuth with the ions of nickel in a linear accelerator.

Practise This Question

If a mixture of CO2 and N2 in equal amount exert a total pressure of 1 atm, the partial pressure of N2 in the mixture is –