Radioactivity and Half Life

Front

What is an isotope?

Back

one of several forms of the same atoms; same number of protons but have different number of neutrons

Front

If one has 12 kg of Polonium and it undergoes two half-lives, how much do you have left?

Back

3 kg

Front

When is the rate of radioactive decay the fastest?

Back

beginning

Front

The rate at which a radioactive element decays is its ____.

Back

half life

Front

Energy in the sun is produced as a result of nuclear ____ reactions.

Back

fusion

Front

Neutrons released in a fission reaction can strike other nuclei and cause a

Back

chain reaction

Front

The three types of nuclear radiation in order of increasing penetrating power are

Back

alpha, beta, gamma

Front

The process by which nuclei having small masses are united to form a single larger nucleus is called nuclear ____.

Back

fusion

Front

Name the instrument used to detect radioactivity.

Back

geiger counter

Front

What makes something radioactive?

Back

an unstable nucleus