• Name: Roentgenium

  • Symbol: Rg

  • Number of Energy Levels: 7

  • Electrons on the outer energy level: 2

  • Atomic Number: 111

  • Atomic Mass: 272 Amu

  • Protons / Electrons: 111

  • Neutrons: 161

  • Density: 28.7 g/cm3

  • Classification: Transition Metal

Top 11 interesting facts about Roentgenium

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