The half-life of a radioactive element is 5. Calculate its decay constant? by Sunday | Aug 27 | Physics WAEC | 0 comments A. 0.113s‾¹ B. 0.436 s‾¹ C. 0.139 s‾¹ D. 0.193 s‾¹ Correct Answer: Option C – 0.139 s‾¹ Users Also Read These:The half-life of a radioactive substance is 2…A radioactive isotope has a decay constant of…A radioactive element has a decay constant of…When a radioactive substance undergoes a beta decay, its?The half-life of a radioactive substance is 15…