The periodic table is a way of arranging all of these chemical elements and putting similar ones together. Image source, Getty Images. Each square on the table includes a number and letters.

Periodic Table Day is celebrated every year on … well, we'll let you figure that out in the quiz just below! Plenty of folks have a fascination with the periodic table all year long.

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 periodic table of chemical elements showing where every atom in the solar system comes from. Jennifer A. Johnson/The Ohio State University; NASA; ESA ...

The periodic table of elements is a landmark categorization developed in 1869 by the Russian chemist and inventor Dmitri ...

The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dimitri Mendeleev. Mendeleev intended the table to ...

The periodic table is 150 – but it could have looked very different. Through the years, plenty of hopefuls have pitched their own ideas for how the most famous graph in science should look.

A new version of the periodic table of elements has predicted hundreds of highly charged ions that could be used to create the next generation of optical atomic clocks. The periodic table, first ...