If 75% of any given amount of radioactive element disintegrates in 60 min. The half life of radioactive element is.
A. 20 min
B. 30 min
C. 45 min
D. 25 min
Answer:B
If 75% of any given amount of radioactive element disintegrates in 60 min. The half life of radioactive element is.
A. 20 min B. 30 min C. 45 min D. 25 min