Fundamental particle

Definition

A fundamental particle is an elementary particle that is not composed of other particles. Examples include quarks and leptons, which are the building blocks of matter.

5 Must Know Facts For Your Next Test

1. Fundamental particles cannot be broken down into smaller components.
2. Quarks and leptons are two categories of fundamental particles.
3. Quarks combine to form protons and neutrons, which are components of atomic nuclei.
4. Leptons include electrons, which orbit the nucleus of an atom.
5. The behavior and interactions of fundamental particles are described by the Standard Model of particle physics.

Review Questions

• What distinguishes a fundamental particle from other types of particles?
• Name two categories of fundamental particles and give an example for each.
• How do quarks contribute to the structure of atomic nuclei?

Related terms

Quark: A type of fundamental particle that combines to form protons and neutrons.

Lepton: A category of fundamental particles that includes electrons.

Standard Model: A theory in particle physics that describes the behavior and interactions of fundamental particles.