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the electrons in the filled, inner energy levels of an atom.
the average mass of all the different isotopes of an element.
to make neutral. An acid-base reaction which produces a salt and water.
the symbols used to represent an element or compound e.g. H2O for water
an acid-base reaction in which there is a transfer of protons.
Ernest Rutherford carried out the famous experiment that led to the hypothesis of the nuclear...