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8(a)(iii)1 mark

The isotope thallium-208 (²⁰⁸₈₁Tl) is radioactive.

Suggest one reason why a nucleus of thallium-208 is unstable.

0625/41/M/J/24Cambridge IGCSE Physics 0625 · May/June 2024 · Paper 4 variant 1 · Question 8(a)(iii)

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Suggested time: 2 min