Q. Which of the following is most unstable
A) Electrons
B) Protons
C) Neutrons
D) $\alpha$-particle
Explanation
(c) Neutrons are unstable and having mean life time of $32\ sec$, decay by emitting an electron and antineutrino to become proton
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.