Radioactivity

Front

What is an isotope?

Back

An atom with different amounts of neutrons.

Front

What is half-life?

Back

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

Front

After the first half-life, how much of the sample is left?

Back

1/2 of the original sample.

Front

After the second half-life, how much of the sample is left?

Back

1/4 of the original sample.

Front

After the third half-life, how much of the sample is left?

Back

1/8 of the original sample.

Front

If the half-life of a radioactive element is 100 years, how long would it take for the radioactivity to reduce by one half?

Back

100 years.

Front

What particle is released during alpha radiation?

Back

A helium nucleus.

Front

What is beta decay?

Back

A type of radioactive decay in which an electron is emitted from an atom.

Front

What is gamma radiation?

Back

High-energy electromagnetic radiation emitted during radioactive decay.

Front

What is a radioactive element?

Back

An element that has an unstable nucleus and emits radiation.