1(c) Atomic Structure

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1.14 know what is meant by the terms atom and molecule
1.15 know the structure of an atom in terms of the positions, relative masses and relative charges of sub-atomic particles
1.16 know what is meant by the terms atomic number, mass number, isotopes and relative atomic mass (Ar)
1.17 be able to calculate the relative atomic mass of an element (Ar) from isotopic abundances