Half-life of a radioactive element is 5 min. At the end of 20 min. Its_____% quantity will remain undisintegrated.
A. 93.73
B. 75
C. 25
D. 6.25
Answer:D
Half-life of a radioactive element is 5 min. At the end of 20 min. Its_____% quantity will remain undisintegrated.
A. 93.73 B. 75 C. 25 D. 6.25