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Encyclopedia

From Wikipedia, the free encyclopedia

Particle may refer to:

In chemistry:

  • Colloidal particle, part of a one-phase system of two or more components where the particles aren't individually visible.

In physics:

In other contexts:

  • Grammatical particle, a function word not assignable to any of the major word classes
  • Particle (band), a 2000 jam band from Los Angeles, California
  • Particle (ecology), in marine and freshwater ecology, a small object
  • Particle (nanotechnology), a small object that behaves as a whole unit in terms of its transport and properties
  • Particle system, in computer graphics, a technique to simulate certain fuzzy phenomena
  • Particulate matter, in the areas of atmospheric physics and air pollution
  • Project Article, technical abbreviation in project management software for a project item

See also


Wiktionary

Up to date as of January 15, 2010
(Redirected to particle article)

Definition from Wiktionary, a free dictionary

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Contents

English

Etymology

From Latin particula (small part, particle), diminutive of pars (part, piece).

Pronunciation

Noun

Singular
particle

Plural
particles

particle (plural particles)

  1. A body with very small size; a fragment.
  2. (physics) An elementary particle or subatomic particle.
  3. (linguistics) A word that has a particular grammatical function but does not obviously belong to any particular part of speech, such as the word to in English infinitives or O as the vocative particle.

Synonyms

Derived terms

Related terms

Translations

The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.

Simple English

atom.]]

Particles are tiny bits of matter that make up everything in the universe. In particle physics, an elementary particle is a particle which cannot be split up into smaller pieces.

There are many different types of particles, all with different sizes and properties.

Three particles which are all around us are the proton, the neutron, and the electron. These are the particles which make atoms. The proton has a positive charge (a + charge). The neutron has a neutral charge. The electron has a negative charge (a - charge), and it is the smallest of these three particles. In atoms, there is a small nucleus in the center, which is where the protons and neutrons are, and electrons orbit the nucleus.

Protons and neutrons are not elementary particles because they are made up of quarks. There are six different types of quarks. These are the up quark, the down quark, the strange quark, the charm quark, the bottom quark, and the top quark. A neutron is made of two down quarks and one up quark. The proton is made up of two up quarks and one down quark.








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