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Mark Scheme (Results) Summer 2016 - Edexcel
calculation of the mass of lithium-7 and the numerator of the RAM expression (1) dividing by 5 and calculating the RAM (1) evaluation of correct answer to 2/3/4 s.f. (1) Example of calculation: Lithium-6 percentage =(0.460 ÷ 5.000 x 100=) 9.2% Lithium-7 …
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