Periodic table

== Periodic table

The periodic table also known as the periodic table of elements (Created by Dimitri Mendeleev) is a table of elements organised by their atomic number. From the lowest atomic element "Hydrogen" To the highest atomic element "Oganesson" These elements 1-118 are put into groups. The alkali metals consist of the chemical elements lithium, sodium, potassium, rubidium, caesium, and francium. Together with Hydrogen they create group 1 which lies in the s block of the periodic table. A metalloid is a type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals. There is no standard definition of a metalloid and no complete agreement on which elements are metalloids. The actinide or actinide series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. The actinide series derives its name from the first element in the series, actinium. Together these groups make up the periodic table.

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