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10 Cards in this Set
- Front
- Back
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Pure Substance |
Pure substance is a matter with a specific fixed composition. |
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Mixture |
Mixture is a matter with a variable composition. |
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Element |
An element is a pure substance that cannot be decomposed into simpler pure substances by chemical or physical changes. |
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Compound |
A compount is a pure substance that is composed of 2 or more chemically bonded elements. |
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Homogenous mixture |
A homogenous mixture is a mixture that is uniform at the molecular level. |
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Alloy |
An alloy is a metal mixture that appears to be homogenous. |
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Law of conservation of mass |
There is no measureable gain or loss of mass in a chemical change. |
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Law of definite proportions |
Element combine chemically to form compounds in fixed definite proportions by mass. |
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Atom |
The smallest part of an element that is unique to that element. |
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Molecule |
A molecule is an electrically neutral partical consisting of two or more chemically bonded atoms.l |
