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PHYSICS

JAMB 2004 - Question 19

Physics 2004 JAMB Past Questions - Question 19: a radioisotope has a decay constant of 10s-¹ the average life of the radioisotope is

Choose the correct answers from the options given.

a radioisotope has a decay constant of 10s-¹ the average life of the radioisotope is

A: 1.00 x 10^7s

B: 6.93 x 10^6s

C: 1.00 x 10^-7s

D: 6.93 x 10^7s

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Correct Answer

Explanation

Average life / Half life (T12) = ln2/λ = 0.693/10−7

= 0.693 x 10^7

= 6.93 x 10^6