Ununseptium is the temporary name of a superheavy artificial chemical element with temporary symbol Uus and atomic number 117. Six atoms were detected by a joint Russia–US collaboration at Dubna, Moscow Oblast, Russia, in November 2010. Although it is currently placed as the heaviest member of the halogen family, there is no experimental evidence that the chemical properties of ununseptium match those of the lighter members like iodine or astatine and theoretical analysis suggests there may be some notable differences.
In January 2010, scientists at the Flerov Laboratory of Nuclear Reactions announced internally that they had succeeded in detecting the decay of a new element with Z=117 using the reactions:
Just six atoms were synthesized of two neighbouring isotopes, neither of which decayed to known isotopes of lighter elements. Their results were published on 9 April 2010 in the journal Physical Review Letters.
The element with atomic number 117 is historically known as eka-astatine. The name ununseptium is a systematic element name, used as a placeholder until the discovery is acknowledged by the IUPAC, and the IUPAC decides on a name. Usually, the name suggested by the discoverer(s) is chosen.
Ununseptium - Periodic Table of Videos
Ununseptium (version 1) - Periodic Table of Videos
Element 117
UNUNSEPTIUM - "Guarde o seu Requiem"
What Is Ununseptium
UNUNSEPTIUM - SUSSURRO DO ARBÍTRIO
Ununseptium (a quick notebookian advert)
All About - Ununseptium
All About - Ununseptium (Extended)
NEWS: May 4, 2014: Big Solar Flare Threat, Element 117 'Ununseptium' & CME Impact
20141009 Janet Kuypers' Periodic Table poem "Ununseptium" at Chicago Calling feature S
How to Pronounce Ununseptium
Ununseptium
Ununseptium
Ununseptium - Periodic Table of Videos
Ununseptium (version 1) - Periodic Table of Videos
Element 117
UNUNSEPTIUM - "Guarde o seu Requiem"
What Is Ununseptium
UNUNSEPTIUM - SUSSURRO DO ARBÍTRIO
Ununseptium (a quick notebookian advert)
All About - Ununseptium
All About - Ununseptium (Extended)
NEWS: May 4, 2014: Big Solar Flare Threat, Element 117 'Ununseptium' & CME Impact
20141009 Janet Kuypers' Periodic Table poem "Ununseptium" at Chicago Calling feature S
How to Pronounce Ununseptium
Ununseptium
Ununseptium
Halvbakkens Ununseptium, kombi NM 2012
117 [Uus] Ununseptium
Mercury Hg - Discovery Mode - Ununseptium / 170 591 (Playstation 3 World Record)
Steganography - Ununseptium The last element discovered 150 Bpm
ChemWiki Elemental Minute: Ununseptium (Overview)
! UNUNSEPTIUM 117 SOLVED!
STA$D400 - ununseptium
Janet Kuypers' poem "Ununseptium" at Kenosha WI's "the Brat Stop" 2/23/14 C
Janet Kuypers' poem "Ununseptium" at Kenosha WI's "the Brat Stop" 2/23/14 C edge detection