Besides the 92 elements that occur naturally, scientists were able to create 20 additional chemical elements. These new elements were produced artificially and are all very short-lived: they decay in ...

The rare radioactive substance made its way from the United States to Russia on a commercial flight in June 2009. Customs officers balked at accepting the package, which was ensconced in lead ...

The heaviest element that humans have ever found is called oganesson. Each atom of the stuff packs a whopping 118 protons into its dense center. In contrast, hydrogen—the most abundant element in the ...