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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 6

A chemist analysed a sample of boron obtained from a mineral. She found that 20% of the boron atoms in the sample were boron-10 and 80% were boron-11.

Use the chemist's results to calculate the relative atomic mass (ArA_rAr​) of the boron in this sample. Your answer should be given to one decimal place.

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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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