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ChemChapter3
Term | Definition |
---|---|
Law of conservation of mass | Mass is neither created nor destroyed during ordinary chemical reactions or physical changes |
Law of definite proportions | 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 |
Law of multiple proportions | 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 |
Atom | The smallest particle of an element that retains the chemical properties of that element |
Nuclear Forces | The interaction that binds protons and neutrons, protons and protons, and neutrons and neutrons together in a nucleus |
Atomic Number | The number of protons of each atom of that element |
Isotopes | Atoms of the same element that have different masses |
Nuclide | A general term for a specific isotope of an element |
Atomic Mass Unit | 1 amu Exactly 1/12 the mass of a carbon-12 atom |
Average Atomic Mass | The weighted average of the atomic masses of the naturally occurring isotopes of an element |
Avogadro's Number | 6.02 * 10^23 The number of particles in exactly 1 mol of a pure substance |
Molar Mass | The mass of one mole of pure substance |