Radioactive Decay and Half Life

Front

What is radioactive decay?

Back

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

Front

What are the three main types of nuclear radiation?

Back

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

Front

Which type of radiation has the highest penetrating power?

Back

Gamma radiation has the highest penetrating power and can penetrate several centimeters of lead or several meters of concrete.

Front

What is a half-life?

Back

Half-life is the amount of time it takes for half of the nuclei in a sample of a radioactive isotope to decay.

Front

What is the mass number in a nuclear symbol?

Back

The mass number (A) in a nuclear symbol represents the total number of protons and neutrons in the nucleus of an atom.

Front

What is an alpha particle?

Back

An alpha particle consists of 2 protons and 2 neutrons, and is emitted during the radioactive decay of heavy elements.

Front

What is a beta particle?

Back

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

Front

What is gamma radiation?

Back

Gamma radiation is a form of electromagnetic radiation emitted from the nucleus of a radioactive atom, and it has no mass or charge.

Front

How does radioactive decay affect the stability of an atom?

Back

Radioactive decay increases the stability of an atom by transforming it into a more stable isotope or element.

Front

What is the relationship between half-life and the decay constant?

Back

The half-life (t1/2) is inversely related to the decay constant (λ) by the formula: t1/2 = ln(2)/λ.