In radioactive decay, what constitutes an alpha particle?
Answer and explanation
Correct answer: B. a helium-4 nucleus consisting of two protons and two neutrons
- Step 1: An alpha particle is a helium nucleus (4He2+) containing 2 protons and 2 neutrons. Answer: a helium-4 nucleus consisting of two protons and two neutrons. Why not the others: Beta particles are electrons/positrons; gamma rays are photons.
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