subatomic particle


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subatomic particle

n.
Any of various particles of matter smaller than a hydrogen atom, including the elementary particles and hadrons.

sub·a·tom·ic particle

(sŭb′ə-tŏm′ĭk)
One of the basic units of which atoms and all matter are made. Protons, neutrons and electrons are subatomic particles.
Did You Know? Until the 20th century, scientists thought that atoms were the smallest units of matter. This view started to change following some experiments in the late 1800s involving electrical discharges. By the early 1900s it was clear that these discharges were composed of a new kind of particle, one that was much lighter than an atom of the lightest chemical element, hydrogen. These particles were named electrons. It was further learned that atoms themselves contained electrons; the electron thus became the first known subatomic particle. Since electrons have negative electrical charge, but the atoms containing them are neutral in charge, researchers believed that atoms must also contain positively-charged particles that balanced the negatively-charged electrons. This idea, together with research into radioactivity, led Ernest Rutherford to the discovery of the atomic nucleus in 1911. Rutherford saw the nucleus as the home of these positively-charged particles (now called protons). Further experiments on radioactivity showed, by 1932, that the nucleus also contained a third kind of particle, the neutron. While electrons, protons, and neutrons are the most familiar subatomic particles, they are not the only ones: dozens more have since been identified. Scientists now think that many subatomic particles are themselves made up of smaller units called elementary particles, such as neutrinos and quarks.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.subatomic particle - a body having finite mass and internal structure but negligible dimensions
virion - (virology) a complete viral particle; nucleic acid and capsid (and a lipid envelope in some viruses)
alpha particle - a positively charged particle that is the nucleus of the helium atom; emitted from natural or radioactive isotopes
beta particle - a high-speed electron or positron emitted in the decay of a radioactive isotope
body - an individual 3-dimensional object that has mass and that is distinguishable from other objects; "heavenly body"
boson - any particle that obeys Bose-Einstein statistics but not the Pauli exclusion principle; all nuclei with an even mass number are bosons
deuteron - the nucleus of deuterium; consists of one proton and one neutron; used as a bombarding particle in accelerators
elementary particle, fundamental particle - (physics) a particle that is less complex than an atom; regarded as constituents of all matter
fermion - any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle
ion - a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons
magnetic monopole - a hypothetical particle with a single magnetic pole instead of the usual two
micelle - an electrically charged particle built up from polymeric molecules or ions and occurring in certain colloidal electrolytic solutions like soaps and detergents
prion - (microbiology) an infectious protein particle similar to a virus but lacking nucleic acid; thought to be the agent responsible for scrapie and other degenerative diseases of the nervous system
virino - (microbiology) a hypothetical infectious particle thought to be the cause of scrapie and other degenerative diseases of the central nervous system; consists of nucleic acid in a protective coat of host cell proteins
scintilla - a sparkling glittering particle
superstring - a hypothetical particle that is the elementary particle in a theory of space-time
thermion - an electrically charged particle (electron or ion) emitted by a substance at a high temperature
References in periodicals archive ?
In quantum physics, a subatomic particle does not exist unless observed.
Although it does not rule out the existence of dark photons, the BaBar results do limit where they can hide, and definitively rule out their explanation for another intriguing mystery associated with the property of the subatomic particle known as the muon," Michael Roney, BaBar spokesperson and professor at the University of Victoria, Canada, said in the statement.
Teams of thousands of CERN scientists also used the state-of-the-art particle accelerator to discover the subatomic particle known as the Higgs boson, without which particles wouldn't hold together and there would be no matter.
THE search is all but over for a subatomic particle that is a crucial building block of the universe.
The medal will also be awarded to international organisation Cern, whose Large Hadron Collider on the Swiss-French border last year detected the existence of an elusive, subatomic particle consistent with the long sought-after "Higgs boson".
The fact is that this Goddamn Particle is a subatomic particle that gives all kinds of matter in the universe their mass, size and shape.
THE discovery of a new subatomic particle at CERN announced on Wednesday has brought cheer to many Indian laboratories and scientists involved with ongoing experiments at the giant circular particle smasher in Geneva.
Scientists working at the world's biggest atom smasher in Switzerland say they have discovered what could be the long-sought Higgs boson, a subatomic particle dubbed the "God particle" because it is believed to give all matter in the universe size and shape.
Two teams of scientists at the European Organization for Nuclear Research (CERN) reported December 13 that they had found "tantalizing hints" of the subatomic particle.
Latest results from the Large Hadron Collider (LHC) show "strong hints" of the subatomic particle which is believed to explain the mystery of mass.
Summary: A finding at one of the world's leading laboratories that a subatomic particle seemed to move faster than the speed of light has scientists around the world reconsidering previous theories.
Washington, March 23 (ANI): Scientists working with the Fermilab atom smasher in Illinois, US, have discovered an unexpected new subatomic particle, which may break all known rules for creating matter.