Radioactivity and Nuclear Reactions

Front

What instrument is used to detect radioactivity?

Back

Geiger counter

Front

What is nuclear fission?

Back

The process where a big nucleus splits into smaller nuclei.

Front

How do the nuclear reactions that power the Sun differ from those in a nuclear power facility?

Back

The Sun is powered by nuclear fusion, while a nuclear power facility uses nuclear fission.

Front

What is a chain reaction in the context of nuclear fission?

Back

A process where neutrons released in a fission reaction strike other nuclei, causing further fission.

Front

What is the splitting of an atomic nucleus into two smaller parts called?

Back

Fission.

Front

What is nuclear fusion?

Back

The process where two light atomic nuclei combine to form a heavier nucleus, releasing energy.

Front

What are the main products of nuclear fission?

Back

Smaller nuclei (fission fragments), neutrons, and energy.

Front

What role do neutrons play in a nuclear fission reaction?

Back

Neutrons can initiate further fission reactions, leading to a chain reaction.

Front

What is the difference between a controlled and uncontrolled nuclear reaction?

Back

A controlled reaction is used in nuclear reactors to produce energy safely, while an uncontrolled reaction can lead to an explosion, as seen in nuclear weapons.

Front

What is radioactive decay?

Back

The process by which an unstable atomic nucleus loses energy by emitting radiation.