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7Sci CH9
7th Science CH9 Discovering Elements
Term | Definition |
---|---|
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 |