You'll find it on the wall of nearly every school chemistry laboratory in the ... it will be 150 years since the Russian scientist, Dmitri Mendeleev, took all of the known elements and arranged ...

but Dmitri Mendeleev published his first version of the periodic table in 1869, and is most often credited as its inventor. Since then, the periodic table has evolved to reflect over 150 years of ...

The Periodic Table is an amazing chemistry tool that is organized with elements in order of increasing atomic number. The properties of the element change as you move across the row, but are similar ...