IUPAC Announces Names of the Elements 113, 115, 117, and 118 (Download PDF)


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International Union of Pure and Applied Chemistry (IUPAC) approved the name and symbols for four elements: nihonium (Nh), moscovium (Mc), tennessine (Ts), and oganesson (Og), respectively for element 113, 115, 117, and 118.

5-month period of public review, the names earlier proposed by the discoverers have been approved by the IUPAC Bureau.

The following names and symbols are officially assigned:

  • Nihonium and symbol Nh, for the element 113
  • Moscovium and symbol Mc, for the element 115
  • Tennessine and symbol Ts, for the element 117
  • Oganesson and symbol Og, for the element 118.
nihonium, moscovium, tennessine, oganesson by IUPAC

Nihonium, Moscovium, Tennessine, Oganesson by IUPAC

nihonium, moscovium, tennessine, oganesson by IUPAC

About Appearance and Characteristics of Tennessine

  • Ts is a superheavy element, a type that does not occur in nature. By exposing one particular isotope - a variant of another element that has the same number of protons but different numbers of neutrons - to a beam of another, the researchers found that on very rare occasions, two heavy nuclei combined to form Ts.
  • Tennessine is a member of Group 17, a group referred to as the halogens, on the periodic table. The group also includes fluorine, chlorine, bromine, iodine, and astatine. Tennessine is regarded as a superheavy element, one can only be synthesized in a lab because it does not appear naturally.
  • Harmful effects: Tennessine is harmful due to its radioactivity.
  • Characteristics: Tennessine is a synthetic radioactive metal and has only been produced in minute amounts.
  • Classification: Tennessine / Ununseptium is a halogen (presumed)
  • Atomic weight: no stable isotopes
  • Protons: 117
  • Electron shells: 2, 8, 18, 32, 32, 18, 7

- Published/Last Modified on: December 4, 2016

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