The half-life of radioactive Radon is ${\rm{3}}.{\rm{8}}\,\,{\rm{days}}$. The time at the end of which (${\rm{1/20}}$)th of the Radon sample will remain undecayed is (given ${\log _{10}}\,e = 0.4343$)

${\rm{16}}{\rm{.5 }}\,{\rm{days}}$

${\rm{13}}{\rm{.8 }}\,{\rm{days}}$

JEE PHYSICS MCQ: NUCLEI

1 Medium

1 of 1

Application +4 | -1

The half-life of radioactive Radon is

\mathrm{3}.\mathrm{8}\,\,\mathrm{days}

. The time at the end of which (

\mathrm{1/20}

)th of the Radon sample will remain undecayed is (given

{\log _{10}}\,e = 0.4343

)

View answer and explanation

Correct option: B

\mathrm{16}\mathrm{.5 }\,\mathrm{days}

Option B (

\mathrm{16}\mathrm{.5 }\,\mathrm{days}

) is correct because it is calculated using the half-life formula and the given logarithmic value.