A radioactive element has a decay constant of 0.077s-1. Calculate its half-life?

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

A radioactive element has a decay constant of 0.077s-1. Calculate its half-life?

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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