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2010 Science News of the Year: Matter & Energy

Approaching the island of stability
Smashing together the elements calcium-48, with 20 protons, and berkelium-249, with 97, has produced superheavy atoms containing 117 protons, albeit for a tiny sliver of a second (SN: 4/24/10, p. 15). Temporarily known as ununseptium, the new element fills an empty spot in the periodic table between the previously discovered elements 116 and 118.

Down at spot 112 on the periodic table, an element first produced in 1996 by German scientists now has a name: copernicium, for the 16th century astronomer Copernicus (SN: 3/27/10, p. 13).

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