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CRChem1Ch3Vocab
CRChemistry1Chapter3Vocabulary
| Question | Answer |
|---|---|
| mass is not created or destroyed during ordinary chemical reactions or physical changes | Law of Conservation of Mass |
| compounds contain the same elements in the same proportions by mass regardless of the size of the sample or source of the compound | Law of Definite Proportions |
| when 2 or more different compounds are made of the same 2 elements, the ratio of the masses of the 2nd element combined with a certain mass of the 1st element is always a ratio of small whole numbers | Law of Multiple Proportions |
| smallest part of an element that retains all the properties of that element | atom |
| short-range proton-neutron, proton-proton, and neutron-neutron forces that hold the nuclear particles together | nuclear forces |
| 1/12 the mass of a carbon-12 atom | atomic mass unit, amu |
| the number of p+ in the nucleus of each atom of that element | atomic number |
| average of all the atomic masses of the naturally-occurring isotopes of an element | average atomic mass |
| the # of particles in exactly 1 mole of a pure substance | Avogadro's number |
| atoms of the same element that have different masses | isotopes |
| total number of p+ plus no in the nucleus of an isotope | mass number |
| mass of 1 mole of a pure substance | molar mass |
| amount of a substance that has as many particles as there are atoms in exactly 12g of carbon-12 | mole |
| general term that refers to any isotope of any element | nuclide |
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CRMissK
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