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16 Cards in this Set
- Front
- Back
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Chemistry |
The scientific study of the composition, structure, and properties of matter and the changes that matter undergoes |
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Matter |
Anything that takes up space and has mass |
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Element |
A substance that cannot be separated or broken down into simpler substances by chemical means |
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Atom |
The smallest unit of an element that maintains the properties of that element |
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Compound |
A substance made of atoms of two or more different elements that are chemically combined |
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Molecule |
The smallest unit of a substance that keeps all of the physical and chemical properties of that substance |
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Chemical formula |
A combination of chemical symbols and numbers to represent a substance |
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Pure substance |
A sample of matter either a single element or single compound has definite chemical and physical properties |
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Mixture |
A combination of two or more substances that are not chemically combined |
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Melting point |
The temperature and pressure which a solid becomes a liquid |
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Boiling point |
The temperature at which a liquid becomes a gas |
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Density |
The ratio of the mass of the substance to the volume of a substance |
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Reactivity |
The ability of a substance to combine chemically with another substance |
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Flammability |
The ability of a substance to react in the presence of oxygen and burn when exposed to a flame |
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Physical change |
A change of matter from one form to another without a change in chemical properties |
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Chemical change |
A change that occurs when a substance changes composition by forming one or more new substances |
