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Also many periodic tables have a stair step line on the table identifying the element groups. It is organized in order of increasing atomic number. The Periodic Table Is Made Up Of Metals Nonmetals And Metalloids The periodic table also known as the periodic table of elements is a tabular display of the chemical elements which are arranged by atomic number electron configuration and recurring chemical properties. Periodic table of elements metals . Elements of the periodic table are grouped as metals metalloids or semimetals and nonmetals. Metals nonmetals and metalloids make up the periodic table with metals constituting the large majority of all metals. The columns called groups contain elements with similar chemical behaviours. The alkaline earth metals have very high melting points and oxides that have basic alkaline solutions. The metalloids separate the metals and nonmetals on a periodic table. The alkaline earth metals make up group 2 of the periodic table from be t...