Get a Hartford Courant subscription for less than 29 cents per day


Periodic table gains 4 new superheavy elements

Periodic table gains 4 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.

The four new elements weren't all discovered on Dec. 30, mind you. But to gain a spot on the periodic table, an element has to pass muster with the International Union of Pure and Applied Chemistry (IUPAC). Elements at the outer bounds of the periodic table are what chemists call superheavy (a reference to their increasing number of atoms, which correspond to their number on the table), and they're all superunstable....