A radioactive substance contains ${\rm{10000}}$ nuclei and its half-life period is ${\rm{20}}$ days. The number of nuclei present at the end of ${\rm{10}}$ days is

JEE PHYSICS MCQ: NUCLEI

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A radioactive substance contains

\mathrm{10000}

nuclei and its half-life period is

\mathrm{20}

days. The number of nuclei present at the end of

\mathrm{10}

days is

View answer and explanation

Correct option: A

\mathrm{7070}

Option A (

\mathrm{7070}

) is correct because it is calculated using the radioactive decay formula

N = N_0 (\frac{1}{2})^{\frac{t}{T}}