A radioisotope has a decay constant of 10-7s-1 ... - JAMB Physics 2004 Question
A radioisotope has a decay constant of 10-7s-1. The average life of the radioisotope is
A
1.00 x 107s
B
6.93 x 108s
C
1.00 x 10-7s
D
6.93 x 107s
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Correct Option: B
Average life / Half life (Tl/2) = ln2/λ = 0.693/10-7
= 0.693 x 107
= 6.93 x 108
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