Half life practice problems

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 type of radiation is emitted if the radiation detected from a piece of rock is reduced significantly when wrapped in foil?

Back

Beta.

Front

If the half-life of strontium-90 is 25 years, how much will remain after 100 years if the initial amount is 4.0 g?

Back

0.25g.

Front

What is it called when scientists split the nuclei of atoms with neutrons?

Back

Nuclear fission.

Front

What is a Nuclear chain reaction?

Back

A process where the products of one reaction cause further reactions.

Front

What is the half-life of an isotope?

Back

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

Front

What happens to the amount of a radioactive substance over time?

Back

It decreases as it decays.

Front

What is Nuclear fusion?

Back

The process of combining two light atomic nuclei to form a heavier nucleus.

Front

What is an example of a radioactive isotope?

Back

Carbon-14.

Front

What is the difference between Alpha and Beta radiation?

Back

Alpha radiation consists of helium nuclei, while Beta radiation consists of electrons or positrons.