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Ununoctium

The Element Ununseptium

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117

Uus

Ununseptium

294

Atomic Number: 117

Atomic Weight: 294

Melting Point: Unknown

Boiling Point: Unknown

Density: Unknown

Phase at Room Temperature: Expected to be a Solid

Element Classification: Unknown

Period Number: 7    Group Number: 17    Group Name: Halogen

Radioactive and Artificially Produced

What's in a name? A temporary name that means one-one-seven.

Say what? Ununseptium is pronounced as oon-oon-SEPT-ee-em.

History and Uses:

On April 5, 2010, scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, along with scientists from the U.S. Department of Energy's Lawrence Livermore National Laboratory, announced the creation of ununseptium. They produced ununseptium by bombarding atoms of berkelium-249 with ions of calcium-48.

Ununseptium's most stable isotope, ununseptium-294, has a half-life of about 80 milliseconds. It decays into ununpentium-290 through alpha decay.

Since only a few atoms of ununseptium have ever been produced, it currently has no uses outside of basic scientific research.

Estimated Crustal Abundance: Not Applicable

Estimated Oceanic Abundance: Not Applicable

Number of Stable Isotopes: 0   (View all isotope data)

Ionization Energy: Unknown

Oxidation States: Unknown

Electron Shell Configuration:

(Unconfirmed)

1s2

2s2   2p6

3s2   3p6   3d10

4s2   4p6   4d10   4f14

5s2   5p6   5d10   5f14

6s2   6p6   6d10

7s2   7p5