E&S: Half Life - Radioactivity

Front

What is the % of the parent isotope remaining after 1 Half Life?

Back

50%

Front

What term is given to unstable radioactive atoms?

Back

Parent

Front

Estimate the percent of isotopes remaining after 3 minutes based on a decay graph.

Back

about 60%

Front

What is the % of the parent isotope remaining after 2 Half Lives?

Back

25%

Front

What is the % of the parent isotope remaining after 3 Half Lives?

Back

12.5%

Front

Define Half Life in the context of radioactivity.

Back

The time required for half of the radioactive atoms in a sample to decay.

Front

What is a Daughter isotope?

Back

The product of the decay of a parent isotope.

Front

How does the concept of Half Life apply to radioactive dating?

Back

It helps determine the age of materials by measuring the remaining parent isotopes.

Front

What happens to the amount of a radioactive substance over successive Half Lives?

Back

It decreases by half with each Half Life.

Front

If a sample starts with 100g of a parent isotope, how much remains after 4 Half Lives?

Back

6.25g