Moderate
An atom of 235U (Z = 92) disintegrates to 207Pb (Z = 82) with a half-life of about billion years will be emitting seven alpha particles and how many β-particles?
Correct answer: C. 4
- A. 3
- B. 5
- C. 4
- D. 6
Explanation
23592U → 20782Pb + 742He + 40-1eThus, 4 beta particles are emitted.
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