Term
| Law of conservation of mass |
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Definition
| states that mass is neither destroyed nor created during ordinary chemical reactions or physical changes |
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Term
| law of multiple proportions |
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Definition
| If two or more different compounds are composed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers |
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Term
| law of definite proportions |
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Definition
| The fact that a chemical compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound |
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Term
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Definition
| the smallest particle of an element that retains the chemical properties of that element |
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Term
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Definition
| these short-range proton-neutron, proton-proton, and neutron-neutron forces hold the nuclear particles together |
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Term
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Definition
| the number of protons and neutrons in the nucleus of each atom of that element |
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Term
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Definition
| atoms of the same element that have different masses |
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Term
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Definition
| the total number of protons and neutrons in the nucleus of an isotope |
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Term
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Definition
| a general term for any isotope of any element |
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Term
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Definition
| or 1 amu, is exactly 1/12 the mass of a carbon-12 atom |
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Term
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Definition
| the weighted average of the atomic mases of the naturally occuring isotopes of an element |
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Term
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Definition
| the amount of a substance that contains as many particles as there are atoms in exactly 12g of carbon-12 |
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Term
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Definition
| 6.0221236 x 10^23--is the number of particles in exactly one mole of a pure substance |
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Term
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Definition
| the mass of one mole of a pure substance |
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