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Metalloids, also known as semimetals are elements containing properties midway between metals and nonmetals. This is a list of the metalloid elements.
Technically the halogens and noble gases are nonmetals, but the nonmetal element group usually is considered to consist of hydrogen, carbon, nitrogen, oxygen, phosphorus, sulfur, and selenium. Properties.y Anne Marie Helmenstine, Ph.D. The nonmetals are in the minority on the periodic table, mostly pushed to the righthand side of the periodic table. Here's a look at how to locate them on the table and their common properties. Location on the Periodic Table. The nonmetals are located on the upper right side of the periodic table.