Exploring Nuclear Reactions and Half-Life

Front

What is a radioactive isotope?

Back

A radioactive isotope is an atom with an unstable nucleus that decays over time, emitting radiation.

Front

Define half-life.

Back

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

Front

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

Back

Remaining amount = Initial amount × (1/2)^(number of half-lives).

Front

What is the half-life of a substance that decays from 200g to 25g in 12 hours?

Back

4 hours.

Front

What are radioisotopes?

Back

Radioisotopes are isotopes of elements that emit radiation and have unstable nuclei.

Front

What is a common risk associated with nuclear power plants?

Back

The production of radioisotopes with long half-lives.

Front

If a radioactive substance has a half-life of 10 years, how long will it take to reduce to 12.5% of its original amount?

Back

30 years.

Front

What is a major challenge in managing nuclear waste?

Back

It is difficult to dispose of nuclear waste safely.

Front

What is the half-life of Strontium-90 if it is determined to be 25 years?

Back

25 years.

Front

What happens to the amount of a radioactive substance after one half-life?

Back

It reduces to half of its original amount.