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Ununhexium - Ununseptium - Ununoctium

Full table
Predicted properties
Name, Symbol, NumberUnunseptium, Uus, 117
Chemical seriesPresumably Halogens
Group, Period, Block17, 7 , p
Appearance unknown, but probably metallic
and dark in appearance
Atomic weight [291] amu(A Guess)
Electron configuration [Rn] 5f14 6d10 7s27p5
(a guess based upon astatine)
e- 's per energy level2, 8, 18, 32, 32, 18, 7
State of matter presumably a solid
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.


The name Ununseptium is used as a placeholder, such as in scientific articles about the search for Element 117; it is a Latinateate way of saying "one-one-seven-ium" ("ium" being a standard ending for element names). Such transuranic elements are always artificially produced, and usually end up being named for a scientist. See Element naming controversy, systematic element name.

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