An atom is a basic unit of matter consisting of a nucleus within a cloud of one or more electrons.

.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(–background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .infobox .side-box{font-size:100%}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:640px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*=”Wiktionary-logo-en-v2.svg”]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*=”Wiktionary-logo-en-v2.svg”]{background-color:white}}

.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}

Look up Atom, atom, atóm, àtom, or atom- in Wiktionary, the free dictionary.

Atom(s) may also refer to:

@media all and (max-width:720px){body.skin-minerva .mw-parser-output .tocright{display:none}.mw-parser-output .tocright{width:100%!important}}@media all and (min-width:720px){.mw-parser-output .tocright{float:right;clear:right;width:auto;margin:0 0 0.5em 1em}.mw-parser-output .tocright-clear-left{clear:left}.mw-parser-output .tocright-clear-both{clear:both}.mw-parser-output .tocright-clear-none{clear:none}}

• Atom (time), a medieval unit of time
• Atom (measure theory), a minimal measurable set
• Atom (order theory)
• Atomic formula, a single predicate in first-order logic
• Atom, an urelement in set theory

• Ariel Atom, a high performance sports car
• Aston Martin Atom, a 1939 prototype car
• ATOM (IFV), an infantry fighting vehicle jointly developed by Russia and France
• Ozone Atom, a French paraglider design

• Atom (Asimov book), 1991 nonfiction book by Isaac Asimov
• Atom (Krauss book), 2001 nonfiction book by Lawrence M. Krauss
• Atom (character), several fictional comic book superheroes from the DC Comics universe
• Atom: The Beginning, Japanese manga series
• Captain Atom, a Charlton Comics superhero
• Atom, the narrator of The History and Adventures of an Atom satire by Tobias Smollett

• Atom™, an alias of the German musician Uwe Schmidt (born 1968)
• Atom, an album by Moonbeam
• A.T.O.M (A Twist of Modern), an album by Carbon/Silicon
• “Atom”, a song by British Sea Power
• “Atom,” a song by Cannibal Ox from The Cold Vein
• Atomi, a Yugoslav rock band

• Atom (martyr), a Christian martyr
• Arthur Thomson (fanzines) or ATom (1927–1990), British science fiction artist and writer
• Atom Araullo, a Filipino broadcast journalist
• Atom Egoyan, a Canadian stage and film director, writer and producer
• Maxwell Atoms (born 1974), American animator

• Philadelphia Atoms, American soccer team (1973–1976)
• Philadelphia Atoms SC, American soccer team (founded 2017)
• Jersey City Atoms, American basketball team
• Tri-City Atoms, various American minor league baseball teams from Washington
• Pohang Atoms, a former name of the Pohang Steelers, Korean association football team
• Atoms, the sports teams of Annandale High School in Virginia

• A.T.O.M. (TV series), a toy line or its associated animated series
• Atom.com, a former on-line video producer, formerly AtomFilms
  • Atom TV, a television series featuring content from Atom.com
• Springfield Atoms, the fictional football team from Springfield in The Simpsons
• The Atom (1918 film), a 1918 silent film directed by Frank Borzage
• “Atoms”, a Series A episode of the television series QI (2003)

• Atom Bank, a digital finance company
• Ancient Teachings of the Masters, a new religious movement
• The Atom (sculpture), in Pendle, Lancashire, England
• A British publisher owned by Little, Brown Book Group
• An object lacking proper parts; see Mereology § Axioms and primitive notions
• Atoms (brand), a footwear brand
• Walter Atom, Czechoslovak aircraft engine
• ATOM Myanmar, Burmese telecommunications company

• Atom and His Package, a band whose sole human member is Adam Goren
• Atomic (disambiguation)
• Atomicity (disambiguation)
• Atomism, philosophy about the basic building blocks of reality
• Nuclear (disambiguation)
• Atum, an ancient Egyptian deity
• Adam (disambiguation)
• All pages with titles beginning with Atom
• All pages with titles containing Atom

.mw-parser-output .dmbox{display:flex;align-items:center;clear:both;margin:0.9em 1em;border-top:1px solid #ccc;border-bottom:1px solid #ccc;padding:0.25em 0.35em;font-style:italic}.mw-parser-output .dmbox>*{flex-shrink:0;margin:0 0.25em}.mw-parser-output .dmbox-body{flex-grow:1;flex-shrink:1;padding:0.1em 0}.mw-parser-output .dmbox-invalid-type{text-align:center}

This disambiguation page lists articles associated with the title Atom.
If an internal link led you here, you may wish to change the link to point directly to the intended article.