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1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes

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Question 7

Every atom of element Z has a mass number of either 52 or 54. The relative atomic mass, ArA_rAr​, of element Z is 53.3. Which percentage abundances of the two isotopes give this relative atomic mass?

[1]
A

65% with mass number 52 and 35% with mass number 54

B

70% with mass number 52 and 30% with mass number 54

C

35% with mass number 52 and 65% with mass number 54

D

50% with mass number 52 and 50% with mass number 54

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1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes

93 exam-style questions on AQA GCSE Chemistry 1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes, covering 1.1.1a Atoms, elements and compounds, 1.1.1b Half equations and ionic equations, 1.1.2 Mixtures, 1.1.3 The development of the model of the atom (common content with physics), 1.1.4 Relative electrical charges of subatomic particles, 1.1.5 Size and mass of atoms, 1.1.6 Relative atomic mass, and 1.1.7 Electronic structure. Each one has a worked solution and a mark scheme showing where the marks go.

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