Ununseptium

Analytical testing dots

Ununseptium is the temporary name of an undiscovered chemical element in the periodic table that has the temporary symbol Uus and has the atomic number 117. It is expected to decay by alpha decay to element 115.

 

General
Name, Symbol, Number ununseptium, Uus, 117
Chemical series presumably halogens
Group, Period, Block 17, 7, p
Appearance unknown,
probably dark metallic
Standard atomic weight unknown gĀ·mol-1
Electron configuration perhaps [Rn] 5f14 6d10 7s2 7p5
(guess based on astatine)
Electrons per shell 2, 8, 18, 32, 32, 18, 7
Phase presumably a solid
CAS registry number 87658-56-8

 

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