Question 15
FUranium-238 decays through a series of nuclei.
The Figure shows the first four decays in the series.
Figure
a.[2]
Identify decay X.
Give a reason for your answer.
b.[2]
Determine the mass number and the atomic number of the uranium nucleus in box 4.
c.[2]
The uranium nucleus in box 1 and the uranium nucleus in box 4 are isotopes of uranium.
Explain why.
d.[1]
Give the mass number of the thorium nucleus in box 5.
6.3 Nuclear equations and decay Questions
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.