A nucleus emits an α- particle, followed by two β- particles. The final nucleus will be:
Correct answer: B. An isotope of the original one
- A. An isotone of the original one
- B. An isotope of the original one
- C. An isobar of the original one
- D. None of these
Explanation
Correct option is B. In alpha decay, the mass number decreases by 4 and the Atomic Number decreases by 2. In each beta decay, the Atomic number increases by 1 but the mass number remains unchanged. mnX-, a + m-4n-2Y _-, 2B + m-4nX The final nucleus is therefore the isotope of the original one as there is no change in the number of electrons and protons but there is only a change in the number of neutrons.
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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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