It, along with the down quark, forms the neutrons (one up quark, two down quarks) and protons (two up quarks, one down quark) of atomic nuclei. It is...

observable matter is composed of up quarks, down quarks and electrons. Owing to a phenomenon known as color confinement, quarks are never found in isolation;...

The strange quark or s quark (from its symbol, s) is the third lightest of all quarks, a type of elementary particle. Strange quarks are found in subatomic...

The proton is made of one down quark with two up quarks, and the neutron is made up of two down quarks with one up quark. Because they are found in every...

bottom quark, beauty quark, or b quark, is an elementary particle of the third generation. It is a heavy quark with a charge of −⁠1/3⁠ e. All quarks are...

The top quark, sometimes also referred to as the truth quark, (symbol: t) is the most massive of all observed elementary particles. It derives its mass...

The charm quark, charmed quark, or c quark is an elementary particle found in composite subatomic particles called hadrons such as the J/psi meson and...

A quark star is a hypothetical type of compact, exotic star, where extremely high core temperature and pressure have forced nuclear particles to form...

Quark or quarg is a type of fresh dairy product made from milk. The milk is soured, usually by adding lactic acid bacteria cultures, and strained once...

In particle physics, the quark model is a classification scheme for hadrons in terms of their valence quarks—the quarks and antiquarks that give rise to...

Quark is a fictional character in the American television series Star Trek: Deep Space Nine. He was played by Armin Shimerman and is a member of the extraterrestrial...

of up and down quarks. Quark matter is a condensed form of matter composed entirely of quarks. When quark matter does not contain strange quarks, it...

quarks (up, charm, and top quarks) are called up-type quarks and have T3 = ⁠++1/2⁠ ; the negatively charged quarks (down, strange, and bottom quarks)...

less. A proton is made of two up quarks and one down quark, while the neutron is made of two down quarks and one up quark. These commonly bind together...

(usually three quarks) and mesons, made of an even number of quarks (usually two quarks: one quark and one antiquark). Protons and neutrons (which make the...

Quark–gluon plasma (QGP or quark soup) is an interacting localized assembly of quarks and gluons at thermal (local kinetic) and (close to) chemical (abundance)...

Look up quark in Wiktionary, the free dictionary. A quark is an elementary particle. Quark may also refer to: "Quark", a nonce word in James Joyce's Finnegans...

from the first fermion generation. The first generation consists of up and down quarks which form protons and neutrons, and electrons and electron neutrinos...

equal number of quarks and antiquarks, usually one of each, bound together by the strong interaction. Because mesons are composed of quark subparticles,...

etc.) and obey the Pauli exclusion principle. These particles include all quarks and leptons and all composite particles made of an odd number of these,...

Quark Software Inc. (founded 1981 in Denver, Colorado, USA) is a privately owned software company which specializes in an integrated, single vendor solution...

Adam Quark, the main character, works to clean up trash in space by collecting "space baggies" with his trusted and highly unusual crew. Quark draws...

up quark and two down quarks. Quarks are held together by the strong force, or equivalently, by gluons, which mediate the strong force at the quark level...

replace quarks. For example, a proton is made of two up quarks and one down quark; and its corresponding antiparticle, the antiproton, is made of two up antiquarks...

Quark matter or QCD matter (quantum chromodynamic) refers to any of a number of hypothetical phases of matter whose degrees of freedom include quarks...

including plasma, Bose–Einstein condensates, fermionic condensates, and quark–gluon plasma. Usually atoms can be imagined as a nucleus of protons and...

QuarkXPress is desktop publishing software for creating and editing complex page layouts in a WYSIWYG (What You See Is What You Get) environment. It runs...

helium-4 (in mass). Neutrons are made up of one up and two down quarks, while protons are made of two up and one down quark. Since the other common elementary...

subatomic particles known as hadrons that led to the development of the quark model. Both the American physicist Murray Gell-Mann and the Israeli physicist...

valence quarks, and together with neutrons are now classified as hadrons. Protons are composed of two up quarks of charge +⁠2/3⁠e each, and one down quark of...