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15 Cards in this Set
- Front
- Back
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Matter |
Anything that has mass and occupies space |
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Mass |
Measurement of the amount of matter in an object |
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Weight |
A measurement of the gravitational force acting on an object |
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Physical properties |
Can be observed or measured without attempting to change the composition of the matter |
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Physical change |
Take place without a change in composition |
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Chemical properties |
Can be observed or measured only by attempting to change the matter into new substances |
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Chemical changes |
Are always accompanied by a change in composition |
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Daltons 1808 atomic theory |
All matter is made up of tiny particles |
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Elements |
Are substances made up of atoms that are all identical |
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Compounds |
Are substances which are combinations of atoms of two or more elements |
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Molecules |
Smaller particle of a pure substance that is capable of stable independent existence |
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Atoms |
Are the particles that make up molecules |
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Pure substances |
Have a constant composition and a fixed set of other physical and chemical properties |
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Mixtures |
Can vary in composition and properties |
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Significant numbers |
All non zero digits are significant Zeros in between digits are significant Leading zeros ARE NOT significant Zeros to the right of the last non zero digit are significant 4.0500, 3.600 , 101.3200 |
