What is the decay constant of a radioactive element whose half-life is 3 seconds? by Sunday | Aug 29 | Physics WAEC | 0 comments A. 0.132s-1 B. 0.23s-1 C. 0.347s-1 D. 0.693s-1 E. 0.924s-1 Correct Answer: Option B – 0.23s-1 Users Also Read These:The half-life of a radioactive substance is 2…The number of protons in an element increased by one…The length of the seconds hand of laboratory clock…A radioactive isotope has a decay constant of…A radioactive element has a decay constant of…