Question 46
Radioactivity and Nuclear PhysicsIt is known that a neutron exists in a light atomic nucleus. Which of the following also exists in the nucleus?
- A.an electron
- B.a β-particle
- C.an α-particle
- D.a proton
- E.an atom.
Show the answer and explanation
Answer: D (a proton)
Explanation
A nucleus is made of protons and neutrons; electrons are outside it.