Q. $\alpha$-particle consists of :
A) 2 protons and 2 neutrons only
B) 2 electrons, 2 protons and 2 neutrons
C) 2 electrons and 4 protons only
D) 2 protons only
Explanation
[Solution] An $\alpha$-particle is a helium nucleus: 2 protons and 2 neutrons. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.