• Name: Ununseptium (temporary)

  • Symbol: Uus

  • Number of Energy Levels: 7 (predicted)

  • Electrons on the outer energy level: 7 (predicted)

  • Atomic Number: 117

  • Atomic Mass: 294 Amu

  • Protons / Electrons: 117

  • Neutrons: 175

  • Density: 7.1 - 7.3 g/cm3 (predicted)

  • Classification: Transition Metal (predicted)

Top 11 interesting facts about Ununseptium (temporary)

  • Ununseptium was discovered in 2010 at Joint Institute for Nuclear Research in Russia and Lawrence Livermore National Laboratory. Ununseptium was named according to IUPAC systematic element name.
  • Its melting point is predicted to be somewhere between 573-773 K (300-500 C, 572-932 F) and its boiling point is predicted to be at 823 K (550 C, 1022 F).
  • Ununseptium is a superheavy, artificial, and highly radioactive chemical element.
  • Ununseptium's name is temporary and it is also known as eka-astatine or simply element 117.
  • Ununseptium is the second heaviest of all know elements up to date.
  • Ununseptium is the most recently discovered element although IUPAC doesn't consider it yet a newly discovered element.
  • Since 2010 ununseptium was repeatedly created in many experiments by different teams of scientists.
  • Ununseptium has melting and boiling points, and the first ionization energy similar to that of the halogens.
  • Ununseptium has many properties different than of those of the halogens and that is because of the orbital speed of its electrons which is very high (comparable to speed of light).
  • Ununseptium-292 is the only known isotope of ununseptium.
  • Ununseptium is used for research purposes only.