The periodic table, also called the periodic table of elements, is an organized arrangement of the 118 known chemical elements. The chemical elements are arranged from left to right and top to bottom ...

It’s been 20 years since The Fifth Element landed on the big screen. But stars Chris Tucker and Milla Jovovich, as well as director Luc Besson, still have fond memories of their time on set — and ...

Recognize these rows and columns? You may remember a detail or two about this mighty table’s organization from a long-ago chemistry class. Elements are ordered according to their number of protons, or ...