THE PERIODIC TABLEDOE-HDBK-1015/1-93Fundamentals of ChemistryCH-01Rev. 0Page 16Figure 4 Regional Schematic of Periodic TableClassesofthePeriodicTableThere are three broad classes of elements. These are the metals, the non-metals, and thesemi-metals. These three classes are grouped together on the periodic table as shown onFigure 4.MetalsThe metals constitute the largest class of elements and are located on the left andtoward the center of the periodic table as shown in Figure 4. In Figure 3, the heavyline running step-wise from boron (B) to astatine (At) generally separates the metalsfrom the rest of the elements (elements in the actinide and lanthanide series aremetals). Metals tend to lose electrons to form positive ions rather than to gainelectrons and become negative ions.
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