Nuclear Decay and Radioactivity CAS

Front

What is nuclear decay?

Back

Nuclear decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, resulting in the transformation of the nucleus into a different element or isotope.

Front

What are the three main types of radiation?

Back

The three main types of radiation are alpha particles, beta particles, and gamma rays.

Front

What is an alpha particle?

Back

An alpha particle consists of 2 protons and 2 neutrons, making it identical to a helium nucleus. It is positively charged and has low penetration power.

Front

What is a beta particle?

Back

A beta particle is a high-energy, high-speed electron or positron emitted during the decay of a radioactive nucleus. It has a negative charge.

Front

What is gamma radiation?

Back

Gamma radiation is a form of electromagnetic radiation emitted from a radioactive nucleus. It has no mass or charge and is highly penetrating.

Front

What happens to the nucleus during nuclear decay?

Back

During nuclear decay, the nucleus changes by losing particles (protons or neutrons) or emitting energy, resulting in a different element or isotope.

Front

What is the Greek symbol for alpha radiation?

Back

The Greek symbol for alpha radiation is α.

Front

What is the Greek symbol for beta radiation?

Back

The Greek symbol for beta radiation is β.

Front

What is the Greek symbol for gamma radiation?

Back

The Greek symbol for gamma radiation is γ.

Front

What is half-life in the context of radioactivity?

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay into a different element or isotope.