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Name: Roentgenium
Symbol: Rg
Number of Energy Levels: 7
Electrons on the outer energy level: 2
Atomic number: 111
Atomic Mass: 272 Amu (Atomic Mass Units) (predicted)
Protons/Electrons: 111
Neutrons: 161
Density: 28.7 g/cm3 (predicted)
Classification: Transition Metal (predicted)

Roentgenium | Chemical elements

Roentgenium was discovered in 1994 at the research center GSI Helmholtz Centre for Heavy Ion Research in Germany. Roentgenium was named after Wilhelm Rontgen the discoverer of X-Rays. Roentgenium’s melting and boiling points are unknown.

Top 9 interesting facts about Roentgenium

  1. Roentgenium is a synthetic element created in laboratory.
  2. Roentgenium is a very radioactive element.
  3. Roentgenium is predicted to be solid under normal conditions.
  4. There are eight known isotopes of roentgenium.
  5. Roentgenium isotopes are extremely unstable and radioactive.
  6. Roentgenium-281 is the most stable isotope of roentgenium with a half-life of 26 seconds.
  7. Roentgenium is believed to behave as heavier homologue to gold.
  8. Roentgenium is believed to have similar properties to its lighter homologues cooper, silver, and gold.
  9. Roentgenium is predicted to be a noble metal with a comparable reactivity to gold.

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