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  1. F

    CHEMISTRY PAPER 21

    the one which contains 8 atoms is sulfur, oxide of most electronegative atom is F2O , cation with biggest radius is Ca , and the one which floats is Na.... 1992 I answered K and FO2 like u but i guess they're wrong ... :S not sure
  2. F

    Chemistry AS Paper 2 Variant 1

    we took variant 1 in egypt too...i wrote the same answers as TravisMcDee and i also mentioned the high activation energies required for the hydrolysis of halogenoalkanes.....
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