What is an alpha particle?
Answer and explanation
Correct answer: A. a helium nucleus of two protons and two neutrons
- Step 1: Alpha radiation consists of heavy, positively charged particles. Step 2. Each one is the nucleus of a helium-4 atom. Answer: a helium nucleus. Why not the others: A fast electron is a beta particle, a high-energy photon is a gamma ray, and a free neutron is a different radiation.
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