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7Sci CH9

7th Science CH9 Discovering Elements

coinage metal copper, silver, and gold, which have been used because they are malleable and easily stamped into coins
ductile ability of an element to be pulled into a wire without breaking; most malleable metals are also ductile
malleable ability of an element to be hammered or pressed into a thin sheet without breaking; most metals are malleable
metalloid elements with properties of both metals and nonmetals; boron and silicon are the two most common
metal groups of elements often having several properties in common, such as luster, hardness, ductility, malleability, and conductivity
nonmetal most common nonmetals are gases, such as oxygen and nitrogen; solid nonmetals such as sulfur, are dull, brittle, and poor conductors of heat and electricity