Physics · May / June 2026 · Paper 11 · Question 36
A nucleus of molybdenum-99, $^{99}_{42}\text{Mo}$, emits a beta particle (β-particle) as it decays to nucleus X. What is the nuclide notation for X?
- A$^{98}_{42}\text{X}$
- B$^{99}_{41}\text{X}$
- C$^{99}_{43}\text{X}$
- D$^{100}_{42}\text{X}$
As printed in the paper
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Correct answer: C. $^{99}_{43}\text{X}$
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