Ununpentium

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  Periodic Table Gains Four New Superheavy Elements

  While you were off celebrating the holidays, the periodic table got a little more complete. Four newly discovered elements managed to squeak their way in just before the end of 2015, filling up the table's seventh row and marking the first additions since 2011.

• Scientists discover new super-heavy element 'ununpentium'

  Scientists in Sweden say they have confirmed the existence of a new chemical element, but its name may need some work.