A radioactive element has a decay constant of 0.077s-1, calculate its half life

By: |Published on: May 22|Categories: Physics WAEC| 0 comments

A. 12.5s
B. 9.0s
C. 5.1s
D. 0.5s

Correct Answer: Option B

B. 9.0s

Explanation

T = 0.692/λ=0.692/0.077

= 9s

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