Science / Periodic Table of Elements / Ununpentium (Uup): Atomic number: 115, 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 by: Scientists from the Joint Institute for Nuclear Research in Dubna, Russia, and Lawrence Livermore National Laboratory in California in 2003. Ununpentium is the temporary name of a arificially produced radioactive chamical element that has the temporary symbol Uup and has the atomic number 115. It was discovered from the bombardment of atoms of Americium-243 with ions of calcium-48. Among the product of the bombardment were four atoms of ununpentium which in less than 1/10 second decayed into atoms of ununtritium. The name Ununpentium is used as a placeholder, such as in scientific articles about the search for Element 115; it is a Latinate way of saying 'one-one-five-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. From its position in the periodic table, in group 15 below bismuth, this element should have the physical properties of a heavy metal and it should be possible for it to have two kind of chemistry, corresponding to the oxidation states M(III) and M(V) with the former being more stable. Applications: Ununpentium does not have any known application and little is known about it. Ununpentium in the environment: Ununpentium is not found free in the environment, since it is a synthetic element.