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  • Relative Atomic Mass

    The Relative Atomic Mass is usually abbreviated to Ar. As it was at GCSE it is is the mass of an...

  • Relative Isotopic Mass

    If each element had only one isotope' then there would be no difference between Relative Atomic...

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current13:02, January 1, 2013Thumbnail for version as of 13:02, January 1, 2013335 × 187 (1 KB)P.Swainson (wall | contribs)