A nucleus of emits a beta particle. Which nucleus is formed?
Answer and explanation
Correct answer: D.
- Step 1: A beta particle is : a neutron turns into a proton, so the atomic number rises by 1 and the mass number stays the same. Step 2. The product is , protactinium. **Answer: . Why not the others:** lowers the atomic number, is the result of alpha decay, and is the loss of a neutron.
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