Editing Atom (section)

=== States ===
{{Main|State of matter|Phase (matter)}}

[[File:Bose Einstein condensate.png|right|thumb|Graphic illustrating the formation of a [[Bose–Einstein condensate]] ]]
Quantities of atoms are found in different states of matter that depend on the physical conditions, such as [[temperature]] and [[pressure]]. By varying the conditions, materials can transition between [[solid]]s, [[liquid]]s, [[gas]]es, and [[plasma (physics)|plasmas]].<ref>
{{cite book
 |last=Goodstein|first=David L.|year=2002
 |title=States of Matter|url=https://archive.org/details/statesmatter00good_082|url-access=limited|publisher=Courier Dover Publications
 |isbn=978-0-13-843557-8|pages=[https://archive.org/details/statesmatter00good_082/page/n445 436]–438
}}</ref> Within a state, a material can also exist in different [[allotropes]]. An example of this is solid carbon, which can exist as [[graphite]] or [[diamond]].<ref name="pu49_7_719" /> Gaseous allotropes exist as well, such as [[dioxygen]] and [[ozone]].

At temperatures close to [[absolute zero]], atoms can form a [[Bose–Einstein condensate]], at which point quantum mechanical effects, which are normally only observed at the atomic scale, become apparent on a macroscopic scale.<ref>
{{cite book
 |last=Myers|first=Richard|year=2003
 |title=The Basics of Chemistry|url=https://archive.org/details/basicschemistry00myer|url-access=limited|publisher=Greenwood Press
 |isbn=978-0-313-31664-7
 |oclc=50164580|page=[https://archive.org/details/basicschemistry00myer/page/n98 85]
}}</ref><ref name=nist_bec /> This super-cooled collection of atoms then behaves as a single [[super atom]], which may allow fundamental checks of quantum mechanical behavior.<ref name=colton_fyffe1999 />
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