TY - AS Foundation Definitions
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Relative Atomic Mass | The average mass of an atom of an element compared with the mass of an atom of Carbon-12, where the mass of Carbon-12 is exactly 12.
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| Relative Molecular Mass | The average mass of the molecules of a compound/element compared with the mass of an atom of Carbon-12, where the mass of Carbon-12 is exactly 12.
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| Relative Isotopic Mass | The mass of an atom of an isotope compared with the mass of an atom of Carbon-12, where the mass of Carbon-12 is exactly 12.
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| Relative Formula Mass | The average mass of formula unit of a compound compared with the mass of an atom of Carbon-12, where the mass of Carbon-12 is exactly 12.
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| The Mole | The amount of substance that contains exactly the same number of particles as in 12g of Carbon-12, that is 6 x 1023.
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| Molar Mass | The mass of one mole of a substance.
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| Empirical Formula | Represents the simplest, whole number ratio of atoms of each element in a compound.
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| Molecular Formula | Represents the actual number of atoms of each element in a molecule of a compound.
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| Avogadro’s Constant | The number of atoms/molecules/ions/electrons in one mole, 6 x 1023.
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| First Ionisation Energy | The energy required to remove one electron from each atom in a mole of atoms in the gaseous state
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| Water of Crystallisation | Water molecules contained within the crystals of a salt
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| Anhydrous | Salts which do not contain water of crystallisation eg CuSO4
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| Hydrated | Salts which contain water of crystallisation eg CuSO4.5H2O
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Created by:
MrsT
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