M.Sc. Bio-Chemistry (PU-CET P.G) 2017 Panjab University Entrance Exam With Answers

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5.

If a radioactive element weighing one Kg. has a half-life of 100 years, it will weigh _____ grams in 300 years.

A: 500
B: 300
C: 125
D: 250

The answer is: C