The activity of a freshly prepared radioactive sample is disintegrations per second

CHEMISTRY · Subjective · US High School · Chemistry · Atomic Structure & Nuclear · Atomic Structure & Nuclear

Problem

The activity of a freshly prepared radioactive sample is

10^{10}

disintegrations per second, whose mean life is

10^9

s. The mass of an atom of this radioisotope is

10^{-25}

kg. The mass (in mg) of the radioactive sample is [2011]