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[[File:3D model hydrogen bonds in water.svg|right|thumb|[[Suv]] molekulasi ikki qism [[vodorod]] va bir qism [[kislorod]]dan tashkil topib, kimyoviy birikmaga misoldir.]]
'''Kimyoviy birikma''' |[[kimyoviy isbnreaksiya]] orqali soddaroq moddalarga ajraluvchi ikki yoki undan ortiq [[kimyoviy unsur]]dan iborat sof [[kimyoviy modda]]dir.<ref name= "Brown 0-13-251210-p.6 }}">[http://www.pearsonschool.com/index.cfm?locator=PSZ16f&PMDBSUBCATEGORYID=&PMDBSITEID=2781&PMDBSUBSOLUTIONID=&PMDBSOLUTIONID=6724&PMDBSUBJECTAREAID=&PMDBCATEGORYID=814&PMDbProgramId=52962 Chemistry: The Central Science, AP Edition]</ref><ref name="Hill p.6">[http://www.pearsonhighered.com/educator/academic/product/0,3110,0131402838,00.html General Chemistry]</ref> Chemical compounds have a unique and defined [[chemical structure]]; they consist of a fixed ratio of atoms<ref name="Whitten p.15"/> that are held together in a defined spatial arrangement by [[chemical bond]]s. Chemical compounds can be [[molecule|molecular]] compounds held together by [[covalent bond]]s, [[salt (chemistry)|salt]]s held together by [[ionic bond]]s, [[intermetallic compounds]] held together by [[metallic bond]]s, or [[complex (chemistry)|complexes]] held together by [[coordinate covalent bond]]s. Pure [[chemical element]]s are not considered chemical compounds, even if they consist of molecules which contain only multiple atoms of a single element (such as H<sub>2</sub>, S<sub>8</sub>, etc.),<ref name=Halal>{{Citation ▼
'''Kimyoviy birikma''' [[kimyoviy reaksiya]] orqali soddaroq moddalarga ajraluvchi ikki yoki undan ortiq [[kimyoviy unsur]]dan<ref name="Brown p.6">{{Citation
| last = Brown
| first = Theodore L.
| last2 = LeMay
| first2 = H. Eugene
| last3 = Bursten
| first3 = Bruce E.
| last4 = Murphy
| first4 = Catherine J.
| last5 = Woodward
| first5 = Patrick
| title = Chemistry: The Central Science, AP Edition
| place = Upper Saddle River, NJ
| publisher = Pearson/Prentice Hall
| year = 2009
| edition = 11th
| pages = 5–6
| url = http://www.pearsonschool.com/index.cfm?locator=PSZ16f&PMDBSUBCATEGORYID=&PMDBSITEID=2781&PMDBSUBSOLUTIONID=&PMDBSOLUTIONID=6724&PMDBSUBJECTAREAID=&PMDBCATEGORYID=814&PMDbProgramId=52962
| isbn = 0-13-236489-1}}</ref><ref name="Hill p.6">{{Citation
| last = Hill
| first = John W.
| last2 = Petrucci
| first2 = Ralph H.
| last3 = McCreary
| first3 = Terry W.
| last4 = Perry
| first4 = Scott S.
| title = General Chemistry
| place = Upper Saddle River, NJ
| publisher = Pearson/Prentice Hall
| year = 2005
| edition = 4th
| page = 6
| url = http://www.pearsonhighered.com/educator/academic/product/0,3110,0131402838,00.html
| isbn = 978-0-13-140283-6}}</ref><ref name="Whitten p.15">{{Citation
| last = Whitten
| first = Kenneth W.
| last2 = Davis
| first2 = Raymond E.
| last3 = Peck
| first3 = M. Larry
| title = General Chemistry
| place = Fort Worth, TX
| publisher = Saunders College Publishing/Harcourt College Publishers
| year = 2000
| edition = 6th
| page = 15
| isbn = 978-0-03-072373-5}}</ref> iborat sof [[kimyoviy modda]]dir.<ref name="Wilbraham p.36">{{Citation
| last = Wilbraham
| first = Antony
| last2 = Matta
| first2 = Michael
| last3 = Staley
| first3 = Dennis
| last4 = Waterman
| first4 = Edward
| title = Chemistry
| place = Upper Saddle River, NJ
| publisher = Pearson/Prentice Hall
| year = 2002
| edition = 1st
| page = 36
▲ | isbn = 0-13-251210-6}}</ref> Chemical compounds have a unique and defined [[chemical structure]]; they consist of a fixed ratio of atoms<ref name="Whitten p.15"/> that are held together in a defined spatial arrangement by [[chemical bond]]s. Chemical compounds can be [[molecule|molecular]] compounds held together by [[covalent bond]]s, [[salt (chemistry)|salt]]s held together by [[ionic bond]]s, [[intermetallic compounds]] held together by [[metallic bond]]s, or [[complex (chemistry)|complexes]] held together by [[coordinate covalent bond]]s. Pure [[chemical element]]s are not considered chemical compounds, even if they consist of molecules which contain only multiple atoms of a single element (such as H<sub>2</sub>, S<sub>8</sub>, etc.),<ref name=Halal>{{Citation
| last = Halal
| first = John
| 