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The half-life of Iodine-131 is 8 days. This mean that
Half life of a radioisotope is the time taken by the radioisotope to disintegrate until
A radioactive substance has half-life of 6 hours. How long will it take for its mass to become 1/16 of its original mass?
hours
15/16 of the atoms of a radioactive sample have decayed in 120 days. What is the half-life of the radioactive substance?
days
Iodine-131 has half-life of 8 days. What percentage of nucleus of iodine-131 has not disintegrated after 32 days?
\[
\begin{array}{|l|l|}
\hline {\text { Time }} & {\text { Count Rate }} \\
\hline 8.00 pm & 1200 s ^{-1} \\
\hline 10.30 pm & 38 s ^{-1} \\
\hline
\end{array}
\]
The table above shows the count rate recorded in a Guiger Muller tube from a sample of radioisotope at 2 different times at the same day. What is the half-life of the radioisotope?
minutes