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The properties of a compound differ, not only from those of other compounds, but also from those of its elements.

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You can tell one compound from another because every compound has a unique set of properties.

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In some chemical reactions, two or more elements combine to form a compound.

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Some compounds can be broken down into their elements by applying heat or using electricity.

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A chemical change, or reaction, happens when one or more substances are changed into one or more other
substances.

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Compound is a substance made up of atoms of two or more different elements joined by chemical bonds.

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Nonmetal is an element that conducts heat and electricity poorly.

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Metalloid are an element that has properties of both metals and nonmetals.

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Metal is an element that is shiny and conducts heat and electricity well.

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A pure substance is a material in which all of the basic particles are identical.

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An element is a pure substance that cannot be separated into simpler substances by chemical or physical methods.