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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

Ununseptium-291 (291
117
Uus
or 291Uus) is a hypothetical radioactive isotope of ununseptium.[1] If this isotope is discovered, it will have 117 protons and 174 neutrons. The atomic mass is predicted to be 291.20656(95)#, with a half-life of 0.97 nanoseconds.[citation needed]


ProductionEdit

SynthesisEdit

It could be produced by bombarding bismuth-209 with selenium-82, thorium-232 with cobalt-59, neptunium-237 with chromium-54, or curium-246 with scandium-45. No attempt has been made to synthesize this isotope by the aforementioned reactions:[1]

209
83
Bi
+ 82
34
Se
291
117
Uus

232
90
Th
+ 59
27
Co
291
117
Uus

237
93
Np
+ 54
24
Cr
291
117
Uus

246
96
Cm
+ 45
21
Sc
291
117
Uus

As a decay productEdit

Ununseptium-291 can also be obtained as a decay product of ununseptium-293:[1]

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

See alsoEdit

ReferencesEdit


Isotopes of ununseptium
Electron shell 117 Ununseptium - no label

282Uus287Uus288Uus289Uus290Uus291Uus292Uus293Uus294Uus295Uus296Uus297Uus298Uus299Uus300Uus303Uus309Uus326Uus334Uus336Uus337Uus
See full list here
Discovered isotopes in bold

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