Regents Chem Nuclear Review

Front

What is the half-life of a radioactive isotope?

Back

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

Front

If you start with 400g of Iodine-131, how much will remain after 24 days?

Back

50g

Front

What are beta particles?

Back

Negatively charged particles emitted from a nucleus at high speed.

Front

Balance the equation: 14_6C --> 0_-1e + ?

Back

14_7N

Front

What is the half-life of strontium-90?

Back

25 years.

Front

How much strontium-90 will remain after 75 years if the initial amount is 100 grams?

Back

12.5 grams.

Front

What is nuclear fission?

Back

A nuclear reaction in which the nucleus of an atom splits into smaller parts, releasing a large amount of energy.

Front

What is nuclear fusion?

Back

A nuclear reaction in which two light atomic nuclei combine to form a heavier nucleus, releasing energy.

Front

What is alpha decay?

Back

A type of radioactive decay in which an atomic nucleus emits an alpha particle (2 protons and 2 neutrons).

Front

What is gamma radiation?

Back

High-energy electromagnetic radiation emitted from a nucleus during radioactive decay.