Atoms of the same element with different numbers of neutrons.
Isotopes
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The number of protons in the nucleus of an atom.
Atomic number
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The number of particles in the nuclues.
Mass number
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A positively or negatively chraged atom or group of atoms.
Ion
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The mass of an atom of an isotope compared with one-twelfth of the mean mass of an atom of carbon-12.
Relative isotopic mass
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The weighted mean mass of an atom of an element compared with one-twelfth of the mass oof an atom of carbon-12
Relative atomic mass
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the weighthed mean mass of a molecule compared with one-twelfth of the mass of an atom compared with carbon-12.
Relative molecular mass
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The weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom of carbon-12.
Relative formula mass
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THe quantity whose unit is the mole. Chemists use 'amount of substance' as a means of counting atoms.
Amount of substance
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The number of atoms per mole of the carbon-12 isotope (6.02x10^23 mol^-1).
The Avogadro constant
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The amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the crabon-12 isotope.
Mole
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The mass per mole of a substance. The units of molar mass are g mol-1.
Molar mass
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The simplest whole-number ratio of atoms of each element present in a compound.
Empirical Formula
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A small group of atoms held together by covalent bonds.
Molecule
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The actual number of atoms of each element in a molecule.
Molecular Formula
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The volume per mole os a gas. The units of molar volume are dm3 mol-1. At room temperature and pressure, the molar volume is approximately 24.0dm3mol-1.
Molar Volume
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The amount of solute, in mol, dissolved per 1 dm3 of solution.
Concentration
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a solution of a known concentration. Standard solutions are normally used in titrations to determine unknown information about another substance.
Standard solution
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Any type of particle that takes part in a chemical reaction
Species
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the molar relationship between the relative quantities of substance taking part in the reaction.
Stoichiometry
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Other cards in this set
Card 2
Front
The number of protons in the nucleus of an atom.
Back
Atomic number
Card 3
Front
The number of particles in the nuclues.
Back
Card 4
Front
A positively or negatively chraged atom or group of atoms.
Back
Card 5
Front
The mass of an atom of an isotope compared with one-twelfth of the mean mass of an atom of carbon-12.
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