The half life of a radioactive material is 12 days. Calculate the decay constant.
A
0.8663 \(day^{-1}\)
B
0.04331 \(day^{-1}\)
C
0.17325 \(day^{-1}\)
D
0.05775 \(day^{-1}\)
Verified Correct Answer: D.
Physical Principles & Numerical Solution
\(T_ {^1/_2}\) = 12 days ;V=?
\(T_ {^1/_2}\) = \(\frac{0.693}{γ}\)
⇒γ ⇒\(\frac{0.693}{t_{^1/_2}}\)
⇒γ =\(\frac{0.693}{12}\)
⇒γ= 0.05775 \(day^{-1}\)
Source: WAEC / JAMB / NECO Classroom Archive (Record #67376)