The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

A zig-zag line divides them. In most periodic tables hydrogen (H) is shown separately but is still classified as a non-metal. Hydrogen is placed on its own as it is quite a unique element.

Meyer's roots, however, were firmly in Germany. Meyer was just four years older than Mendeleev, and produced several Periodic Tables between 1864-1870. His first table contained just 28 elements, ...

A Russian scientist called Dmitri Mendeleev produced one of the first practical periodic tables in the nineteenth century. The modern periodic table is based closely on the ideas he used.

A team of scientists set out to probe some of the heaviest elements in the periodic table using an advanced form of laser ...

UT-Battelle, the managing contractor of ORNL, is donating new charts of the periodic table to public middle and high schools in Tennessee to mark the discovery of the element tennessine.