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13 Cards in this Set
- Front
- Back
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Isotopes
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Atoms of the same element with different numbers of neutrons
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Atomic (Proton) Number
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Number of protons in the nucleus of an atom
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Mass (Nucleon) Number
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Number of particles (protons and neutrons) in the nucleus
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Ion
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Positively or negatively charged atom or (covalently bonded) group of atoms (a molecular ion)
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Relative Isotopic Mass
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The mass of an atom of an isotope compared with 1/12th of the mass of an atom of carbon-12
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Relative Atomic Mass
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The weighted mean mass of an atom of an element compared with 1/12th of the mass of an atom of carbon-12
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Relative Molecular Mass
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The weighted mean mass of a molecule compared with 1/12th of the mass of an atom of catbon-12
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Relative Formula Mass
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The weighted mean mass of a formula unit compared with 1/12th the mass of an atom of carbon-12
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Amount Of Substance
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Quantity whose unit is the mole. Chemists use 'amount of substance' as a means of counting atoms
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Avagadro Constant
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The number of atoms per mole of the carbon-12 isotope (6.02 x 10^23mol-1)
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Mole
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The amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the carbon-12 isotope
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Molar Mass
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The mass per mole of a substance. The units of molar mass are g mol-1
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Empirical Formula
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Simplest whole number ratio of atoms of each element present in a compound
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