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 ...

You may use table navigation commands for the screen reader of your choice. The Periodic Table of Elements. Each entry contains the atomic number, chemical symbol, and atomic mass to two decimal ...

In the current version of the periodic table, the heaviest element, which appears in its lower right corner, is oganesson (Og), atomic number 118. For sixty years, the Russian researcher has been ...

Currently, there are 118 known elements on the periodic table, from hydrogen all the way ... will remain intact and stable for longer than current known superheavy isotopes after they reach ...