Ununseptium (Uus)- Discovery, Occurrence, Production, Properties and Applications of Ununseptium

Topics Covered

Chemical Formula
Background
Basic Information
Occurrence
Isotopes
Production
Health Aspects
Key Properties
Applications
References

Chemical Formula

Uus

Background

Ununseptium was identified on April 5, 2010 by a group of scientists (Russian and American) working at the Joint Institute for Nuclear Research in Dubna, Russia. The group was headed by Yuri Oganessian. As of now, the results for this element do not meet the criteria for discovery according to International Union of Pure and Applied Chemistry (IUPAC).

The term ununseptium has been given on a temporary basis. Unless IUPAC validates its existence, it will not be entered into the periodic table.

Basic Information

Name Ununseptium
Symbol Uus
Atomic number 117
Atomic weight [ 294 ]
Standard state Presumably a solid at 298 K
CAS Registry ID 87658-56-8
Group in periodic table 17
Group name Halogen
Period in periodic table 7
Block in periodic table p-block
Color Unknown, but is likely to be metallic and dark in appearance
Classification Unknown
Melting point Unknown
Boiling point Unknown
Density Unknown
Phase at room temperature
 Expected to be a solid

Occurrence

It is a highly radioactive metal and only a few atoms have ever been produced.

Ununseptium (version 2) - Periodic Table of Videos

Isotopes

Related Stories

Research has resulted in the identification of two isotopes of ununseptium with mass numbers 293 and 294. Both the isotopes are unstable. The approximate half-life of ununseptium-293 is 14 ms and ununseptium-294 is 78 ms.

Production

Scientists created ununseptium by bombarding atoms of berkelium-249 with ions of calcium-48.

Health Aspects

Ununseptium is considered to be harmful due to its radioactive nature. However, it has not been properly researched to provide specific details regarding its health effects.

Key Properties

The key properties of ununseptium are listed below:

  • Radioactive
  • Expected to have chemical properties characteristic of halogens
  • Effects of relativistic electrons could result in partial metalloid properties

Applications

Currently, ununseptium has no applications outside the realm of scientific research.

References

http://www.webelements.com/ununseptium/

http://education.jlab.org/itselemental/ele117.html

http://www.rsc.org/periodic-table/element/117/ununseptium

http://www.chemicool.com/elements/ununseptium.html

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G.P. Thomas

Written by

G.P. Thomas

Gary graduated from the University of Manchester with a first-class honours degree in Geochemistry and a Masters in Earth Sciences. After working in the Australian mining industry, Gary decided to hang up his geology boots and turn his hand to writing. When he isn't developing topical and informative content, Gary can usually be found playing his beloved guitar, or watching Aston Villa FC snatch defeat from the jaws of victory.

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