Chemistry Advanced Subsidiary PAPER 1: Core Inorganic and Physical Chemistry,. GCE EXAM LEVEL 3. GRADED A+

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Answer ALL questions. Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 Brom... ine exists as two stable isotopes. The two isotopes are represented by the symbols 35 79Br and 35 81Br. (a) Give one similarity and one difference between these two isotopes by referring to the number of particles in the nuclei of the two isotopes. (2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (b) The relative abundance of the two isotopes in a sample cannot be found in a chemical test. (i) Give the reason why, despite the difference in atomic structure, the isotopes have the same chemical reactions. (1) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (ii) State how the relative abundance of the two isotopes can be found. (2 [Show More]

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