Ununpentium
Atomic Symbol Uup
Atomic Number 115
Atomic Weight unknown
presumably a solid at 298 K
Color unknown, but probably metallic and silvery white or grey in appearance

Ununpentium is a synthetic element that is not present in the environment. Isolation of an any quantity of ununpentium has never been achieved, and thus ununpentium has no known uses. The reactivity of ununpentium is unknown, but is assumed to be similar to astatine and iodine.

In July and August of 2003, ununpentium and ununtrium were successfully produced by a team made up of scientists from Lawrence Livermore National Laboratory in California and the Joint Institute for Nuclear Research in Dubna, Russia.

In Dubna, scientists fired a rare isotope of calcium at americium. Four times during a month of continuous bombardment, a calcium nucleus fused with an americium nucleus and created the new element, number 115.

The atoms of element 115 decayed into ununtrium, element 113, in a fraction of a second. The atoms of 113 lasted for as long as 1.2 seconds before decaying to known elements.

No name has yet been suggested for element 115, which is therefore called ununpentium, from the Latin roots un for one and pent for five, under a convention for neutral temporary names proposed by the International Union of Pure and Applied Chemistry (IUPAC) in 1980.

                 bismuth
                     ^
ununquadium <-- ununpentium --> ununhexium

ununpentium is also how Bill 'n' Ted refer to certain Intel chips.

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