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  • Chemistry-F321
    • module 1-atoms and reactions
      • moles
        • Avogadro constant
          • 6.02214179x1023
      • titration
      • oxidation number
      • water of crystallisation
      • atomic structure
        • atomic masses
          • carbon 12 is the standard for measuring atomic masses
          • all atomic masses are compared with carbon
          • relative molecular mass
            • add together the atomic masses in the molecule
            • the weight mean mass of a molecule compared with 1/12 of the mass of carbon 12
        • protons, neutrons and electrons
          • isotopes
            • isotopes of the same element have
              • different masses
              • same number of protons and electrons
              • different number of neutrons in the nucleus
            • carbon
              • the overall charge of the atom must be 0
              • mixture of isotopes
                • carbon-13
                • carbon-12
                • carbon-14
              • work out the number of neutrons by subtracting the atomic number from the mass number
            • different isotopes of the same element react in the same way


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