A sealed sample initially contains atoms of a radioactive isotope whose half-life is

PHYSICS · Subjective · A Level · Physics · Nuclear physics · Nuclear physics

Problem

A sealed sample initially contains

6.0\times10^{20}

atoms of a radioactive isotope whose half-life is

2.5\,\text{h}

. Calculate the number of atoms that remain undecayed after

7.5\,\text{h}