Which one of the following emissions takes place in the nuclear reaction? 90Th234 → 91Pa232 + _ + 20n1
Correct answer: C. Beta
- A. Alpha
- B. Gamma
- C. Beta
- D. Photons
Explanation
Since the atomic mass is reduced by 2 and the atomic number is reduced by 1, beta emission has taken place along with emission of two neutrons since beta particles have atomic mass and atomic number of 0 and 1 respectively.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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