Half-Life

Front

If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.

Back

1.25mg

Front

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

Back

0.25g

Front

You have 100 grams of radioactive C-14. The half life of C-14 is 5730 years. How many grams are left after 1 half life?

Back

50 grams

Front

Half-life

Back

The amount of time it takes for half the nuclei in a sample of the isotope to decay

Front

When nuclei decay, __________ is released.

Back

radiation

Front

What is the Half life of this isotope?

Back

10 seconds

Front

What is the Half Life of this isotope?

Back

3 days

Front

Why is radioactive carbon-14 useful in determining the absolute age of geologic samples?

Back

decay at a regular rate

Front

What is the half-life of iodine-131 based on this graph?

Back

8 days

Front

Half-life

Back

The amount of time it takes for half the nuclei in a sample of the isotope to decay