Q. In half life of a radio isotope is 2 seconds and number of atoms are only 4, then after one half life remaining (without decay) atoms are probably
A) 1
B) 2
C) 3
D) All the above
Explanation
(b) $N = N_{0}\left( \frac{1}{2} \right)n = 4 \times \frac{1}{2} = 2$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.