Relate the amount of an original sample of a radioisotope that remains after a specified amount of time if given the half-life of the radioisotope.
A radioisotope has a half-life of 12.4 minutes.
How much time would elapse before a sample of the radioisotope contains 50% of its original amount?
time
minutes
How much time would elapse before a sample of the radioisotope contains 25% of its original amount?
A radioisotope has a half-life of 2.16 days.
Time
days
How much time would elapse before a sample of the radioisotope contains 12.5% of its original amount?
A radioisotope has a half-life of 1.34 years.
What percentage of the original sample of this radioisotope would be present after 1.34 years?
Percentage Remaining
%
What percentage of the original sample of this radioisotope would be present after 2.68 years?
A radioisotope has a half-life of 4.20 days.
What percentage of the original sample of this radioisotope would be remaining after 16.80 days?
Percent Remaining
How many half-lives is this 16.80 days equivalent to?
# of Half-Lives
A radioisotope has a half-life of 6.50 minutes.
What percentage of the original sample of this radioisotope would be remaining after 39.00 minutes? Enter your answer with at least 3 decimal places.
How many half-lives is this 39.00 minutes equivalent to?
A radioisotope has a half-life of 12.5 minutes. A 1000.0-gram sample of the isotope is available at t = 0 minutes. Determine the amount that is remaining at the times specified in the table at the right.
Row 2:
g
Row 3:
Row 4:
Row 5:
Row 6: