Masses of atoms and molecules

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GCSE C2 Mind Map on Masses of atoms and molecules, created by danielberthaur on 19/11/2013.
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Mind Map by danielberthaur, updated more than 1 year ago
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  1. Relative molecular mass
    1. When atoms make molecules the mass of the molecule can be calculated
      1. By adding the relative atomic masses of the atoms that make the molecule up
        1. E.G- PbSO4
          1. P- 207
            1. S-32
              1. O-4
                1. Mr of PbSO4 is 207+32+(4*16)=303
                2. Symbol of Mr
                  1. Usually called relative formula mass when talking in terms of ionic compounds
                  2. Relative atomic mass
                    1. Symbol of Ar
                      1. Mass number (Top Number) is the Mass of the element
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