If the decay constant of a radioactive substance is 0.231s¹; the half-life is?

A. 3.00 s
B. 0.12 s
C. 0.33 s
D. 1.50 s

Correct Answer:

Option A = 3.00 s

Explanation

Half-life, T ½  =  (0.693)/∆ = (0.693)/ 0.231 = 3.0sec