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 ...

If you were to take every element in the periodic table and order them by how abundant they are in the Universe, you'd find something a little bit surprising. The most common element is hydrogen, ...

A century ago, the periodic table looked much different than it does today. It had empty spots for elements that had not yet been found, and ended at uranium (element 92), the heaviest known element ...

Researchers have demonstrated a new way to make superheavy elements, offering a method to create element 120 — which would be the heaviest element ever made. Scientists at the Lawrence Berkeley ...