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2025 · O/N · 5054/12 | Q37

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CIE-5054-2025-ON-p12 · Question 37

You may use a calculator. Take the weight of 1.0 kg to be 9.8 N (acceleration of free fall = 9.8 m/s²).
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37 Which nuclide is produced when thorium-223, 223Th, emits an alpha-particle? 90 A 219Ra B 219U C 227Ra D 227U 88 92 88 92

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5054/12/O/N/25Cambridge O Level Physics 5054 · Oct/Nov 2025 · Paper 1 variant 2 · Question 37