The Periodic Table was created by a Russian scientist Dmitri Mendeleev in 1869, and it is the visual display of chemical elements, in the groupings by their properties. The Periodic table consists of several groups- the alkali metals, the alkali earth metals, Lanthanides, Actinides, Transition Metals, Post- transition metals, Metalloids, Halogens, and Noble Gases. All of the elements want to be as similar as possible to the Noble Gases because they have a complete valence shell. All of the other elements are either trying to gain or to lose electrons to make their valance shells complete. In the Periodic Table, there are also some blank spaces, and these are for the elements that have not yet been created, or have been created but only lasted for several split seconds. Before Medeleev, there have been previous attempts to create something like this Periodic Tale, but were not a success. Also, everything is organized in periods, and groups. A group is a vertical column, while the period is a horizontal row on the table. The Periodic Table helps us categorize elements, and understand their properties better because of their classings.
