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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.
Nonmetals have properties opposite those of the metals. The nonmetals are brittle, not malleable or ductile, poor conductors of both heat and electricity, and tend to gain electrons in chemical reactions. Some nonmetals are liquids.These elements are shown in the following figure. The nonmetals in the periodic table.onmetals have properties opposite those of the metals. The nonmetals are brittle, not malleable or ductile, poor conductors of both heat and electricity, and tend to gain electrons in chemical reactions. Some nonmetals are liquids.