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2.1 Atomic structure

2.1 Atomic structure

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Question 4
45%

A sample of the Group 1 metal rubidium contains:

  • 72.17% rubidium-85
  • 27.83% rubidium-87

Calculate the relative atomic mass (ArA_rAr​) of this sample of rubidium. Give your answer to 2 decimal places.

[2]
Markscheme

2.1 Atomic structure Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Atomic structure

87 exam-style questions on Edexcel GCSE Chemistry 2.1 Atomic structure, covering 2.1.1 Development of the atomic model, 2.1.2 Structure of the atom and subatomic particles, 2.1.3 Mass number, isotopes and relative atomic mass, and 2.1.4 Calculating relative atomic mass from isotopic abundance. Each one has a worked solution and a mark scheme showing where the marks go.

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