Physics (AS & A Level) · May / June 2023 · Paper 11 · Question 39
9702Atoms, nuclei and radiation
A uranium nucleus has 92 protons and 143 neutrons. The nucleus emits a total of 3 α-particles and 4 β– particles to form nucleus X. How can nucleus X be represented?
- A^{131}_{90}X
- B^{219}_{87}X
- C^{223}_{82}X
- D^{223}_{90}X
As printed in the paper
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Correct answer: D. ^{223}_{90}X
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