A radioactive element has a decay constant of 0.077s-1, calculate its half life
-
A.
12.5s -
B.
9.0s -
C.
5.1s -
D.
0.5s
Correct Answer: Option B
Explanation
T = (frac{0.692}{lambda} = frac{0.692}{0.077})
= 9s
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