Front

Negatively charged particles found outside of the nucleus are called

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

A nuclear reaction where a nucleus splits into two smaller nuclei is called

Back

Fission is the process in which a heavy nucleus splits into two smaller nuclei, releasing energy.

Front

Which type of radiation has the lowest penetrating power and can be stopped by a piece of paper?

Back

Alpha radiation has the lowest penetrating power and can be stopped by paper or clothing.

Front

What do two different isotopes of an atom have in common?

Back

Different isotopes of an atom have the same number of protons but different numbers of neutrons.

Front

Which type of radiation has the highest penetrating power and can penetrate several centimeters of lead?

Back

Gamma radiation has the highest penetrating power and can penetrate thick materials like lead and concrete.

Front

What is the nucleus of an atom composed of?

Back

The nucleus is composed of protons and neutrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge; it is neutral.

Front

What is the difference between fission and fusion?

Back

Fission is the splitting of a nucleus, while fusion is the combining of two light nuclei to form a heavier nucleus.

Front

What is radioactive decay?

Back

Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation.