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can be separated into pure substances by physical methods, properties are indefinite and vary
predictable properties, but can be broken down into elements by ordinary chemical reactions
the abbreviated name of each element used to identify the element on the periodic table
semimetal (or metalloid)
an element that typically has properties midway between those of metals and nonmetals
an element that typically is a solid, has bright metallic luster, high density, high melting point, and good conductor of heat and electricity
an element that usually has low density, low melting point, and poor conductor of heat and electrity
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