Question: Answer the following question given this paragraph: In alpha decay, energy and an alpha particle are emitted by a nucleus that is unstable because it has too many protons. An alpha particle consists of two protons and two neutrons, so it is actually a helium nucleus. Q: What is an alpha particle with two protons and two neutrons called? Choices: - chloride nucleus - hydrogen nucleus - hydrogen nucleus - helium nucleus A:
Answer:
helium nucleus