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12 Cards in this Set
- Front
- Back
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atom
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The smallest unit of an element that has the properties of that element.
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molecule
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A group of two or more atoms that are joined chemically.
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element
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A substance made of only one kind of atom.
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change of state
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A physical change that occurs when matter changes from one state to another, such as from a liquid to a gas.
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physical change
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A change in which a substance remains the same substance.
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mixture
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A combination of two or more different substances.
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physical property
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A trait - such as color, shape, or hardness - that describes a substance by itself.
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chemical property
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A property that involves the ability of a substance to react with other materials to form new substances.
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chemical change
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A change in which a substance or two becomes a new substance or two.
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chemical reaction
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A change in which one or more new substances are formed.
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compound
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A substance made of two or more different elements.
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law of conservation of mass
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The mass of the products of a chemical reaction equals the mass of the reactants.
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