Q. Alpha rays emitted from a radioactive substance are
A) Negatively charged particles
B) Ionized hydrogen nuclei
C) Doubly ionized helium atom
D) Unchanged particles having the mass equal to proton
Explanation
The correct answer is Option C: Doubly ionized helium atom.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.