A radioactive isotope has a half-life of 5 days

CHEMISTRY · Single correct · US High School · Chemistry · Atomic Structure & Nuclear · Atomic Structure & Nuclear

Problem

A radioactive isotope has a half-life of 5 days. Which of the following is its decay constant

k

(in

\text{day}^{-1}

)? (a)

\dfrac{\ln 2}{5}

(b)

-\dfrac{5}{\ln 2}

(c)

-\dfrac{\ln 2}{5}

(d)

-\dfrac{1}{10}