Half-Life

Front

What is Half-life?

Back

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

Front

What is the only difference between two different isotopes of the same element?

Back

Number of neutrons.

Front

What percentage of the parent isotope remains after 2 Half Lives?

Back

25%.

Front

If an isotope has a Half-life of 3 days, how much of the parent isotope remains after 6 days?

Back

25%.

Front

What is the Half-life of this isotope? (Example: 5 seconds, 10 seconds, 15 seconds, 20 seconds)

Back

10 seconds.

Front

What is the Half-life of this isotope? (Example: 3 days, 5 days, 8 days, 10 days)

Back

3 days.

Front

How do you calculate the remaining amount of a substance after a certain number of Half-lives?

Back

Use the formula: Remaining Amount = Initial Amount * (1/2)^(number of Half-lives).

Front

What happens to the number of radioactive nuclei in a sample over time?

Back

It decreases exponentially.

Front

What is a parent isotope?

Back

The original radioactive isotope that undergoes decay.

Front

What is a daughter isotope?

Back

The product of the decay of a parent isotope.