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 ...

The periodic table is a matrix comprising seven rows (“periods”) and 18 columns (“groups”). It organizes chemical elements by atomic number horizontally and electron configuration vertically.

Time to update all those science textbooks across the globe. Scientists in Japan, Russia and America discovered four new elements that have been added to the periodic table, completing its seventh ...