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 ...

Can you name everything from Ac to Zr? Test your knowledge of the periodic table and see if you can top the leaderboard ...

Elements in the same column in the periodic table (‘homologues’) share similar chemical properties because they have similar electron configurations, with the same number of electrons in their ...

And for chemistry, no cause for celebration surpasses the origin of the periodic table of the elements, created 150 years ago this March by the Russian chemist Dmitrii Ivanovich Mendeleev.

Four chemical elements have been formally added to the periodic table, completing the scheme's seventh row. They are the first to be included in the table since 2011, when elements 114 and 116 ...