Ununtrium

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.

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.