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This article is about an undiscovered isotope. Once it is discovered, this article will be edited with more information.


Ununseptium-291 (291Uus)
Transactinoid
'
General
Name, symbol ununseptium-291, 291Uus
Isotope of ununseptium
Neutrons 174
Protons 117
Nuclide data
Natural abundance Synthetic
Half-life 0.97 ns
Decay products Unknown
Isotope mass 291.20656(95)#
Spin Unknown
Excess energy Unknown
Binding energy Unknown
Decay mode Unknown
Decay energy Unknown
History
Discoverer None of as yet
Location discovered None of as yet
Date discovered None of as yet

Tennessine-291 (291
117
Uus
or 291Uus) is a hypothetical radioactive isotope of tennessine.[1] If this isotope is discovered, it will have 117 protons and 174 neutrons.

ProductionEdit

SynthesisEdit

The reaction

238
92
U
+ 55
25
Mn
293
117
Uus
291,290
117
Uus
+ 2-3 1
0
n

has been predicted as a synthesis route to Ts 291, although the synthesis has not been attempted[1].

This nuclide is predicted to decay primarily via alpha emission, but it may have a competing beta (positron or EC) decay branch. Its half-life is predicted to be on the order of a second[2].

See alsoEdit

ReferencesEdit

2. "Chart of the Nuclides, 2014"; JAEA Nuclear Data Center
Isotopes of ununseptium
Electron shell 117 Ununseptium - no label

282Uus287Uus288Uus289Uus290Uus291Uus292Uus293Uus294Uus295Uus296Uus297Uus298Uus299Uus300Uus303Uus309Uus326Uus334Uus336Uus337Uus
See full list here
Discovered isotopes in bold

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