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Metalloid 1Definition: Formerly, the metallic base of a fixed alkali, or alkaline earth; applied by Sir H. Davy to sodium, potassium, and some other metallic substances whose metallic character was supposed to be not well defined.
Metalloid 2Definition: Now, one of several elementary substances which in the free state are unlike metals, and whose compounds possess or produce acid, rather than basic, properties; a nonmetal; as, boron, carbon, phosphorus, nitrogen, oxygen, sulphur, chlorine, bromine, etc., are metalloids. Metalloid 3Definition: Having the appearance of a metal. Metalloid 4Definition: Having the properties of a nonmetal; nonmetallic; acid; negative. metalloid 5Definition: of or being a nonmetallic element that has some of the properties of metal; "arsenic is a metalloid element"
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