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6.3 Nuclear equations and decay

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Question 12

A sealed radioactive source contains iodine-131 nuclei. The nuclear data for iodine-131 are shown in the table.

Nuclear quantityValue
Mass number131
Atomic number53

The number of neutrons in one nucleus is needed for the source record.

Calculate this number.

[2]
Markscheme

6.3 Nuclear equations and decay Questions

  1. GCSE
  2. /Physics
  3. /6.3 Nuclear equations and decay

120 exam-style questions on Edexcel GCSE Physics 6.3 Nuclear equations and decay, covering 6.3.1 Beta-minus and beta-plus decay, 6.3.2 Effects of decay on the nucleus, and 6.3.3 Balancing nuclear equations. Each one has a worked solution and a mark scheme showing where the marks go.

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