A radioactive isotope has a decay constant of 10^-5s^4. Calculate half-life.

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A. 6.93 x 105s
B. 6.93 x 105s
C. 6.93 x 104s
D. 6.93 x 104s

Correct Answer:

Option C – 6.93 x 104s

Explanation

T½ = (0.693)/λ = (0.693)/10-5

= 0.693 x 105
= 6.93 x 104sec

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