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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 has mass and takes up space |
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Element |
A substance that cannot be separated or broken down |
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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 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 a single compound that has a 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 at 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 a 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 a chemical properties |
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chemical change |
a change that occurs when a substance changes composition by forming one or more new substances |
