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6.3 Nuclear equations and decay

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Question 33

A nucleus undergoes two alpha decays and one beta-minus decay. The final nucleus contains 82 protons and 125 neutrons. Which pair describes the original nucleus?

[1]

mass number $215$ ; atomic number $87$

mass number $199$ ; atomic number $79$

mass number $215$ ; atomic number $85$

mass number $211$ ; atomic number $83$

Markscheme

6.3 Nuclear equations and decay Questions

GCSE
Physics
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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