The half-life of a radioactive substance is 2 seconds. Ca...
The half-life of a radioactive substance is 2 seconds. Calculate the decay constant.
2.890 s-1
1.445 s-1
0.576 s-1
0.347s-1
0.152 s-1
Correct answer is D
T12=ln2λ
where T12 = half-life of element; λ = decay constant.
= 0.693λ
∴
\lambda = \frac{0.693}{2}
= 0.3465 s^{-1}
\approxeq 0.347 s^{-1}