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6.3 Nuclear equations and decay

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Question 8

A nucleus undergoes one beta-minus decay followed by one alpha decay. The final nucleus has a mass number of 204 and an atomic number of 79.

Which pair describes the original nucleus?

[1]

mass number $204$ ; atomic number $80$

mass number $204$ ; atomic number $78$

mass number $208$ ; atomic number $82$

mass number $208$ ; atomic number $80$

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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