The half-life of a certain radioisotope is 5 h

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

Problem

The half-life of a certain radioisotope is 5 h. How long will it take for its activity to fall to one-eighth of the initial value? (a)

10 \text{ h}

(b)

20 \text{ h}

(c)

15 \text{ h}

(d)

17.3 \text{ h}