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Ununseptium - Uus

Chemical properties of ununseptium - Health effects of ununseptium - Environmental effects of ununseptium

Atomic number 117
Atomic mass unknown
Electronegativity acoording to Pauling unknown
Density unknown
Melting point unknown
Boiling point unknown
Vanderwaals radius unknown
Ionic radius unknown
Isotopes unknown
Discovered Undiscovered


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 Latinate 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.


Not applicable

Ununseptium in the environment

Undiscovered element

Health effects of ununseptium

As it hasn’t been discovered yet, its health effects haven’t been studied.

Environmental effects of ununseptium

As it hasn’t been discovered yet, its environmental effects haven’t been studied.

Back to chart periodic elements


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