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A radioactive isotope has a decay constant of 10-5

A radioactive isotope has a decay constant of 10-5s4. Calculate half life

A.

6.93 x 10-5s

B.

6.93 x 105s

C.

6.93 x104s

D.

6.93 x 10-4s

View answer & explanation

Correct answer is C

T (1)/2 = (0.693)/λ = (0.693)/10-5
= 0.693 x 105
= 6.93 x 104 sec

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