The Periodic Table is a thing of beauty, but it can also feel pretty mysterious, especially if the last time you studied it was back in grade school. Now is a great time to get reacquainted.

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 origins of the periodic table, however, go back to the 1860s. Russian chemist Dmitri Mendeleev, building on the work of others, took the 63 known elements — including hydrogen, ...

We begin all the way back when Mendelev figured out the periodic table. He arranged the known elements according to their atomic weight, and noticed periodic recurrences of chemical properties as ...

Discover the history, structure, and importance of the periodic table of elements, from Mendeleev’s discovery to modern scientific applications. When you purchase through links on our site, we ...