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Disponible en 99 langues." > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-99" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">99 langues</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Chemiese_formule" title="Chemiese formule – afrikaans" lang="af" hreflang="af" data-title="Chemiese formule" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B5%D9%8A%D8%BA%D8%A9_%D9%83%D9%8A%D9%85%D9%8A%D8%A7%D8%A6%D9%8A%D8%A9" title="صيغة كيميائية – arabe" lang="ar" hreflang="ar" data-title="صيغة كيميائية" data-language-autonym="العربية" data-language-local-name="arabe" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D9%81%D9%88%D8%B1%D9%85%D9%88%D9%84%D8%A9_%D9%83%D9%8A%D9%85%D8%A7%D9%88%D9%8A%D8%A9" title="فورمولة كيماوية – arabe marocain" lang="ary" hreflang="ary" data-title="فورمولة كيماوية" data-language-autonym="الدارجة" data-language-local-name="arabe marocain" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/F%C3%B3rmula_qu%C3%ADmica" title="Fórmula química – asturien" lang="ast" hreflang="ast" data-title="Fórmula química" data-language-autonym="Asturianu" data-language-local-name="asturien" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Kimy%C9%99vi_formul" title="Kimyəvi formul – azerbaïdjanais" lang="az" hreflang="az" data-title="Kimyəvi formul" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaïdjanais" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A5%D1%96%D0%BC%D1%96%D1%87%D0%BD%D0%B0%D1%8F_%D1%84%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0" title="Хімічная формула – biélorusse" lang="be" hreflang="be" data-title="Хімічная формула" data-language-autonym="Беларуская" data-language-local-name="biélorusse" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A5%D0%B8%D0%BC%D0%B8%D1%87%D0%BD%D0%B0_%D1%84%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0" title="Химична формула – bulgare" lang="bg" hreflang="bg" data-title="Химична формула" data-language-autonym="Български" data-language-local-name="bulgare" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-blk mw-list-item"><a href="https://blk.wikipedia.org/wiki/%E1%80%93%E1%80%AC%E1%80%90%E1%80%AF%E1%80%97%E1%80%B1%E1%80%92_%E1%80%96%E1%80%B1%E1%80%AC%E1%80%BA%E1%80%99%E1%80%BB%E1%80%B0%E1%80%9C%E1%80%AC" title="ဓာတုဗေဒ ဖော်မျူလာ – Pa'O" lang="blk" hreflang="blk" data-title="ဓာတုဗေဒ ဖော်မျူလာ" data-language-autonym="ပအိုဝ်ႏဘာႏသာႏ" data-language-local-name="Pa'O" class="interlanguage-link-target"><span>ပအိုဝ်ႏဘာႏသာႏ</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%B0%E0%A6%BE%E0%A6%B8%E0%A6%BE%E0%A6%AF%E0%A6%BC%E0%A6%A8%E0%A6%BF%E0%A6%95_%E0%A6%B8%E0%A6%82%E0%A6%95%E0%A7%87%E0%A6%A4" title="রাসায়নিক সংকেত – bengali" lang="bn" hreflang="bn" data-title="রাসায়নিক সংকেত" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Formulenn_gimiek" title="Formulenn gimiek – breton" lang="br" hreflang="br" data-title="Formulenn gimiek" data-language-autonym="Brezhoneg" data-language-local-name="breton" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Hemijska_formula" title="Hemijska formula – bosniaque" lang="bs" hreflang="bs" data-title="Hemijska formula" data-language-autonym="Bosanski" data-language-local-name="bosniaque" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/F%C3%B3rmula_qu%C3%ADmica" title="Fórmula química – catalan" lang="ca" hreflang="ca" data-title="Fórmula química" data-language-autonym="Català" data-language-local-name="catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/Hu%C3%A1-h%C5%8Fk-s%C3%A9k" title="Huá-hŏk-sék – Mindong" lang="cdo" hreflang="cdo" data-title="Huá-hŏk-sék" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%B4%DB%8E%D9%88%DA%AF%DB%8C_%DA%A9%DB%8C%D9%85%DB%8C%D8%A7%DB%8C%DB%8C" title="شێوگی کیمیایی – sorani" lang="ckb" hreflang="ckb" data-title="شێوگی کیمیایی" data-language-autonym="کوردی" data-language-local-name="sorani" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Chemick%C3%BD_vzorec" title="Chemický vzorec – tchèque" lang="cs" hreflang="cs" data-title="Chemický vzorec" data-language-autonym="Čeština" data-language-local-name="tchèque" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%A5%D0%B8%D0%BC%D0%B8%D0%BB%D0%BB%D0%B5_%D1%84%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0" title="Химилле формула – tchouvache" lang="cv" hreflang="cv" data-title="Химилле формула" data-language-autonym="Чӑвашла" data-language-local-name="tchouvache" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Sumformel" title="Sumformel – danois" lang="da" hreflang="da" data-title="Sumformel" data-language-autonym="Dansk" data-language-local-name="danois" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Chemische_Formel" title="Chemische Formel – allemand" lang="de" hreflang="de" data-title="Chemische Formel" data-language-autonym="Deutsch" data-language-local-name="allemand" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A7%CE%B7%CE%BC%CE%B9%CE%BA%CF%8C%CF%82_%CF%84%CF%8D%CF%80%CE%BF%CF%82" title="Χημικός τύπος – grec" lang="el" hreflang="el" data-title="Χημικός τύπος" data-language-autonym="Ελληνικά" data-language-local-name="grec" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Chemical_formula" title="Chemical formula – anglais" lang="en" hreflang="en" data-title="Chemical formula" data-language-autonym="English" data-language-local-name="anglais" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Kemia_formulo" title="Kemia formulo – espéranto" lang="eo" hreflang="eo" data-title="Kemia formulo" data-language-autonym="Esperanto" data-language-local-name="espéranto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/F%C3%B3rmula_qu%C3%ADmica" title="Fórmula química – espagnol" lang="es" hreflang="es" data-title="Fórmula química" data-language-autonym="Español" data-language-local-name="espagnol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Keemiline_valem" title="Keemiline valem – estonien" lang="et" hreflang="et" data-title="Keemiline valem" data-language-autonym="Eesti" data-language-local-name="estonien" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Formula_kimiko" title="Formula kimiko – basque" lang="eu" hreflang="eu" data-title="Formula kimiko" data-language-autonym="Euskara" data-language-local-name="basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%81%D8%B1%D9%85%D9%88%D9%84_%D8%B4%DB%8C%D9%85%DB%8C%D8%A7%DB%8C%DB%8C" title="فرمول شیمیایی – persan" lang="fa" hreflang="fa" data-title="فرمول شیمیایی" data-language-autonym="فارسی" data-language-local-name="persan" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Kemiallinen_kaava" title="Kemiallinen kaava – finnois" lang="fi" hreflang="fi" data-title="Kemiallinen kaava" data-language-autonym="Suomi" data-language-local-name="finnois" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Foirmle_cheimiceach" title="Foirmle cheimiceach – irlandais" lang="ga" hreflang="ga" data-title="Foirmle cheimiceach" data-language-autonym="Gaeilge" data-language-local-name="irlandais" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gan mw-list-item"><a href="https://gan.wikipedia.org/wiki/%E5%8C%96%E5%AD%B8%E5%BC%8F" title="化學式 – gan" lang="gan" hreflang="gan" data-title="化學式" data-language-autonym="贛語" data-language-local-name="gan" class="interlanguage-link-target"><span>贛語</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/F%C3%B3rmula_qu%C3%ADmica" title="Fórmula química – galicien" lang="gl" hreflang="gl" data-title="Fórmula química" data-language-autonym="Galego" data-language-local-name="galicien" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gv mw-list-item"><a href="https://gv.wikipedia.org/wiki/Formley_kemmigagh" title="Formley kemmigagh – mannois" lang="gv" hreflang="gv" data-title="Formley kemmigagh" data-language-autonym="Gaelg" data-language-local-name="mannois" class="interlanguage-link-target"><span>Gaelg</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9B%D7%AA%D7%99%D7%91_%D7%9B%D7%99%D7%9E%D7%99" title="כתיב כימי – hébreu" lang="he" hreflang="he" data-title="כתיב כימי" data-language-autonym="עברית" data-language-local-name="hébreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B0%E0%A4%BE%E0%A4%B8%E0%A4%BE%E0%A4%AF%E0%A4%A8%E0%A4%BF%E0%A4%95_%E0%A4%B8%E0%A5%82%E0%A4%A4%E0%A5%8D%E0%A4%B0" title="रासायनिक सूत्र – hindi" lang="hi" hreflang="hi" data-title="रासायनिक सूत्र" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Kemijska_formula" title="Kemijska formula – croate" lang="hr" hreflang="hr" data-title="Kemijska formula" data-language-autonym="Hrvatski" data-language-local-name="croate" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/F%C3%B2mil_chimik" title="Fòmil chimik – créole haïtien" lang="ht" hreflang="ht" data-title="Fòmil chimik" data-language-autonym="Kreyòl ayisyen" data-language-local-name="créole haïtien" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/K%C3%A9miai_k%C3%A9plet" title="Kémiai képlet – hongrois" lang="hu" hreflang="hu" data-title="Kémiai képlet" data-language-autonym="Magyar" data-language-local-name="hongrois" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%94%D5%AB%D5%B4%D5%AB%D5%A1%D5%AF%D5%A1%D5%B6_%D5%A2%D5%A1%D5%B6%D5%A1%D5%B1%D6%87" title="Քիմիական բանաձև – arménien" lang="hy" hreflang="hy" data-title="Քիմիական բանաձև" data-language-autonym="Հայերեն" data-language-local-name="arménien" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Formula_chimic" title="Formula chimic – interlingua" lang="ia" hreflang="ia" data-title="Formula chimic" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Rumus_kimia" title="Rumus kimia – indonésien" lang="id" hreflang="id" data-title="Rumus kimia" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonésien" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Kemiala_formulo" title="Kemiala formulo – ido" lang="io" hreflang="io" data-title="Kemiala formulo" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Efnaform%C3%BAla" title="Efnaformúla – islandais" lang="is" hreflang="is" data-title="Efnaformúla" data-language-autonym="Íslenska" data-language-local-name="islandais" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Formula_chimica" title="Formula chimica – italien" lang="it" hreflang="it" data-title="Formula chimica" data-language-autonym="Italiano" data-language-local-name="italien" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%8C%96%E5%AD%A6%E5%BC%8F" title="化学式 – japonais" lang="ja" hreflang="ja" data-title="化学式" data-language-autonym="日本語" data-language-local-name="japonais" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Rumus_kimia" title="Rumus kimia – javanais" lang="jv" hreflang="jv" data-title="Rumus kimia" data-language-autonym="Jawa" data-language-local-name="javanais" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%A5%E1%83%98%E1%83%9B%E1%83%98%E1%83%A3%E1%83%A0%E1%83%98_%E1%83%A4%E1%83%9D%E1%83%A0%E1%83%9B%E1%83%A3%E1%83%9A%E1%83%90" title="ქიმიური ფორმულა – géorgien" lang="ka" hreflang="ka" data-title="ქიმიური ფორმულა" data-language-autonym="ქართული" data-language-local-name="géorgien" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Taftart_takrurant" title="Taftart takrurant – kabyle" lang="kab" hreflang="kab" data-title="Taftart takrurant" data-language-autonym="Taqbaylit" data-language-local-name="kabyle" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A5%D0%B8%D0%BC%D0%B8%D1%8F%D0%BB%D1%8B%D2%9B_%D1%84%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0" title="Химиялық формула – kazakh" lang="kk" hreflang="kk" data-title="Химиялық формула" data-language-autonym="Қазақша" data-language-local-name="kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-km mw-list-item"><a href="https://km.wikipedia.org/wiki/%E1%9E%9A%E1%9E%BC%E1%9E%94%E1%9E%98%E1%9E%93%E1%9F%92%E1%9E%8F%E1%9E%82%E1%9E%B8%E1%9E%98%E1%9E%B8" title="រូបមន្តគីមី – khmer" lang="km" hreflang="km" data-title="រូបមន្តគីមី" data-language-autonym="ភាសាខ្មែរ" data-language-local-name="khmer" class="interlanguage-link-target"><span>ភាសាខ្មែរ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%99%94%ED%95%99%EC%8B%9D" title="화학식 – coréen" lang="ko" hreflang="ko" data-title="화학식" data-language-autonym="한국어" data-language-local-name="coréen" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%A5%D0%B8%D0%BC%D0%B8%D1%8F%D0%BB%D1%8B%D0%BA_%D1%84%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0%D0%BB%D0%B0%D1%80" title="Химиялык формулалар – kirghize" lang="ky" hreflang="ky" data-title="Химиялык формулалар" data-language-autonym="Кыргызча" data-language-local-name="kirghize" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Formula_chemica" title="Formula chemica – latin" lang="la" hreflang="la" data-title="Formula chemica" data-language-autonym="Latina" data-language-local-name="latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Cheemesch_Formel" title="Cheemesch Formel – luxembourgeois" lang="lb" hreflang="lb" data-title="Cheemesch Formel" data-language-autonym="Lëtzebuergesch" data-language-local-name="luxembourgeois" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Furmula_chimica" title="Furmula chimica – lombard" lang="lmo" hreflang="lmo" data-title="Furmula chimica" data-language-autonym="Lombard" data-language-local-name="lombard" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Chemin%C4%97_formul%C4%97" title="Cheminė formulė – lituanien" lang="lt" hreflang="lt" data-title="Cheminė formulė" data-language-autonym="Lietuvių" data-language-local-name="lituanien" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/%C4%B6%C4%ABmisk%C4%81_formula" title="Ķīmiskā formula – letton" lang="lv" hreflang="lv" data-title="Ķīmiskā formula" data-language-autonym="Latviešu" data-language-local-name="letton" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A5%D0%B5%D0%BC%D0%B8%D1%81%D0%BA%D0%B0_%D1%84%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0" title="Хемиска формула – macédonien" lang="mk" hreflang="mk" data-title="Хемиска формула" data-language-autonym="Македонски" data-language-local-name="macédonien" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%B0%E0%B4%BE%E0%B4%B8%E0%B4%B8%E0%B5%82%E0%B4%A4%E0%B5%8D%E0%B4%B0%E0%B4%82" title="രാസസൂത്രം – malayalam" lang="ml" hreflang="ml" data-title="രാസസൂത്രം" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%B0%E0%A4%BE%E0%A4%B8%E0%A4%BE%E0%A4%AF%E0%A4%A8%E0%A4%BF%E0%A4%95_%E0%A4%B8%E0%A5%82%E0%A4%A4%E0%A5%8D%E0%A4%B0" title="रासायनिक सूत्र – marathi" lang="mr" hreflang="mr" data-title="रासायनिक सूत्र" data-language-autonym="मराठी" data-language-local-name="marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Formula_kimia" title="Formula kimia – malais" lang="ms" hreflang="ms" data-title="Formula kimia" data-language-autonym="Bahasa Melayu" data-language-local-name="malais" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%93%E1%80%AC%E1%80%90%E1%80%AF%E1%80%97%E1%80%B1%E1%80%92_%E1%80%96%E1%80%B1%E1%80%AC%E1%80%BA%E1%80%99%E1%80%BB%E1%80%B0%E1%80%9C%E1%80%AC" title="ဓာတုဗေဒ ဖော်မျူလာ – birman" lang="my" hreflang="my" data-title="ဓာတုဗေဒ ဖော်မျူလာ" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birman" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Summenformel" title="Summenformel – bas-allemand" lang="nds" hreflang="nds" data-title="Summenformel" data-language-autonym="Plattdüütsch" data-language-local-name="bas-allemand" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%B0%E0%A4%BE%E0%A4%B8%E0%A4%BE%E0%A4%AF%E0%A4%A8%E0%A4%BF%E0%A4%95_%E0%A4%B8%E0%A5%82%E0%A4%A4%E0%A5%8D%E0%A4%B0" title="रासायनिक सूत्र – népalais" lang="ne" hreflang="ne" data-title="रासायनिक सूत्र" data-language-autonym="नेपाली" data-language-local-name="népalais" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Chemische_formule" title="Chemische formule – néerlandais" lang="nl" hreflang="nl" data-title="Chemische formule" data-language-autonym="Nederlands" data-language-local-name="néerlandais" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Kjemisk_formel" title="Kjemisk formel – norvégien nynorsk" lang="nn" hreflang="nn" data-title="Kjemisk formel" data-language-autonym="Norsk nynorsk" data-language-local-name="norvégien nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Kjemisk_formel" title="Kjemisk formel – norvégien bokmål" lang="nb" hreflang="nb" data-title="Kjemisk formel" data-language-autonym="Norsk bokmål" data-language-local-name="norvégien bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Formula_quimica" title="Formula quimica – occitan" lang="oc" hreflang="oc" data-title="Formula quimica" data-language-autonym="Occitan" data-language-local-name="occitan" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%B0%E0%A8%B8%E0%A8%BE%E0%A8%87%E0%A8%A3%E0%A8%95_%E0%A8%AB%E0%A8%BC%E0%A8%BE%E0%A8%B0%E0%A8%AE%E0%A9%82%E0%A8%B2%E0%A8%BE" title="ਰਸਾਇਣਕ ਫ਼ਾਰਮੂਲਾ – pendjabi" lang="pa" hreflang="pa" data-title="ਰਸਾਇਣਕ ਫ਼ਾਰਮੂਲਾ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="pendjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Symbolika_chemiczna" title="Symbolika chemiczna – polonais" lang="pl" hreflang="pl" data-title="Symbolika chemiczna" data-language-autonym="Polski" data-language-local-name="polonais" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%DA%A9%DB%8C%D9%85%DB%8C%D8%A7%D8%A6%DB%8C_%D9%81%D8%A7%D8%B1%D9%85%D9%88%D9%84%D8%A7" title="کیمیائی فارمولا – Western Punjabi" lang="pnb" hreflang="pnb" data-title="کیمیائی فارمولا" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/F%C3%B3rmula_qu%C3%ADmica" title="Fórmula química – portugais" lang="pt" hreflang="pt" data-title="Fórmula química" data-language-autonym="Português" data-language-local-name="portugais" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Formul%C4%83_chimic%C4%83" title="Formulă chimică – roumain" lang="ro" hreflang="ro" data-title="Formulă chimică" data-language-autonym="Română" data-language-local-name="roumain" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A5%D0%B8%D0%BC%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F_%D1%84%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0" title="Химическая формула – russe" lang="ru" hreflang="ru" data-title="Химическая формула" data-language-autonym="Русский" data-language-local-name="russe" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%A5%D0%B8%D0%BC%D0%B8%D1%8F_%D1%84%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0%D1%82%D0%B0" title="Химия формулата – iakoute" lang="sah" hreflang="sah" data-title="Химия формулата" data-language-autonym="Саха тыла" data-language-local-name="iakoute" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Chemical_formula" title="Chemical formula – écossais" lang="sco" hreflang="sco" data-title="Chemical formula" data-language-autonym="Scots" data-language-local-name="écossais" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Hemijska_formula" title="Hemijska formula – serbo-croate" lang="sh" hreflang="sh" data-title="Hemijska formula" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croate" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%BB%E0%B7%83%E0%B7%8F%E0%B6%BA%E0%B6%B1%E0%B7%92%E0%B6%9A_%E0%B7%83%E0%B7%96%E0%B6%AD%E0%B7%8A%E2%80%8D%E0%B6%BB" title="රසායනික සූත්‍ර – cingalais" lang="si" hreflang="si" data-title="රසායනික සූත්‍ර" data-language-autonym="සිංහල" data-language-local-name="cingalais" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Chemical_formula" title="Chemical formula – Simple English" lang="en-simple" hreflang="en-simple" data-title="Chemical formula" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Chemick%C3%BD_vzorec" title="Chemický vzorec – slovaque" lang="sk" hreflang="sk" data-title="Chemický vzorec" data-language-autonym="Slovenčina" data-language-local-name="slovaque" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-skr mw-list-item"><a href="https://skr.wikipedia.org/wiki/%DA%A9%DB%8C%D9%85%DB%8C%D8%A7%D8%A6%DB%8C_%D9%81%D8%A7%D8%B1%D9%85%D9%88%D9%84%D8%A7" title="کیمیائی فارمولا – Saraiki" lang="skr" hreflang="skr" data-title="کیمیائی فارمولا" data-language-autonym="سرائیکی" data-language-local-name="Saraiki" class="interlanguage-link-target"><span>سرائیکی</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Kemijska_formula" title="Kemijska formula – slovène" lang="sl" hreflang="sl" data-title="Kemijska formula" data-language-autonym="Slovenščina" data-language-local-name="slovène" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Formula_kimike" title="Formula kimike – albanais" lang="sq" hreflang="sq" data-title="Formula kimike" data-language-autonym="Shqip" data-language-local-name="albanais" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A5%D0%B5%D0%BC%D0%B8%D1%98%D1%81%D0%BA%D0%B0_%D1%84%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0" title="Хемијска формула – serbe" lang="sr" hreflang="sr" data-title="Хемијска формула" data-language-autonym="Српски / srpski" data-language-local-name="serbe" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-stq mw-list-item"><a href="https://stq.wikipedia.org/wiki/Chemiske_Formel" title="Chemiske Formel – saterlandais" lang="stq" hreflang="stq" data-title="Chemiske Formel" data-language-autonym="Seeltersk" data-language-local-name="saterlandais" class="interlanguage-link-target"><span>Seeltersk</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Kemisk_formel" title="Kemisk formel – suédois" lang="sv" hreflang="sv" data-title="Kemisk formel" data-language-autonym="Svenska" data-language-local-name="suédois" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%AE%E0%AF%82%E0%AE%B2%E0%AE%95%E0%AF%8D%E0%AE%95%E0%AF%82%E0%AE%B1%E0%AF%8D%E0%AE%B1%E0%AF%81_%E0%AE%B5%E0%AE%BE%E0%AE%AF%E0%AF%8D%E0%AE%AA%E0%AE%BE%E0%AE%9F%E0%AF%81" title="மூலக்கூற்று வாய்பாடு – tamoul" lang="ta" hreflang="ta" data-title="மூலக்கூற்று வாய்பாடு" data-language-autonym="தமிழ்" data-language-local-name="tamoul" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%B0%E0%B0%B8%E0%B0%BE%E0%B0%AF%E0%B0%A8_%E0%B0%B8%E0%B1%82%E0%B0%A4%E0%B1%8D%E0%B0%B0%E0%B0%82" title="రసాయన సూత్రం – télougou" lang="te" hreflang="te" data-title="రసాయన సూత్రం" data-language-autonym="తెలుగు" data-language-local-name="télougou" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%A4%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0%D0%B8_%D1%85%D0%B8%D0%BC%D0%B8%D1%8F%D0%B2%D3%A3" title="Формулаи химиявӣ – tadjik" lang="tg" hreflang="tg" data-title="Формулаи химиявӣ" data-language-autonym="Тоҷикӣ" data-language-local-name="tadjik" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%AA%E0%B8%B9%E0%B8%95%E0%B8%A3%E0%B9%80%E0%B8%84%E0%B8%A1%E0%B8%B5" title="สูตรเคมี – thaï" lang="th" hreflang="th" data-title="สูตรเคมี" data-language-autonym="ไทย" data-language-local-name="thaï" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Pormulang_kemikal" title="Pormulang kemikal – tagalog" lang="tl" hreflang="tl" data-title="Pormulang kemikal" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Kimyasal_form%C3%BCl" title="Kimyasal formül – turc" lang="tr" hreflang="tr" data-title="Kimyasal formül" data-language-autonym="Türkçe" data-language-local-name="turc" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A5%D1%96%D0%BC%D1%96%D1%87%D0%BD%D0%B0_%D1%84%D0%BE%D1%80%D0%BC%D1%83%D0%BB%D0%B0" title="Хімічна формула – ukrainien" lang="uk" hreflang="uk" data-title="Хімічна формула" data-language-autonym="Українська" data-language-local-name="ukrainien" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%DA%A9%DB%8C%D9%85%DB%8C%D8%A7%D8%A6%DB%8C_%D8%B5%DB%8C%D8%BA%DB%81" title="کیمیائی صیغہ – ourdou" lang="ur" hreflang="ur" data-title="کیمیائی صیغہ" data-language-autonym="اردو" data-language-local-name="ourdou" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Kimyoviy_formulalar" title="Kimyoviy formulalar – ouzbek" lang="uz" hreflang="uz" data-title="Kimyoviy formulalar" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="ouzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/C%C3%B4ng_th%E1%BB%A9c_h%C3%B3a_h%E1%BB%8Dc" title="Công thức hóa học – vietnamien" lang="vi" hreflang="vi" data-title="Công thức hóa học" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamien" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Formula_nga_kimikal" title="Formula nga kimikal – waray" lang="war" hreflang="war" data-title="Formula nga kimikal" data-language-autonym="Winaray" data-language-local-name="waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E5%8C%96%E5%AD%A6%E5%BC%8F" title="化学式 – wu" lang="wuu" hreflang="wuu" data-title="化学式" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%8C%96%E5%AD%A6%E5%BC%8F" title="化学式 – chinois" lang="zh" hreflang="zh" data-title="化学式" data-language-autonym="中文" data-language-local-name="chinois" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E5%8C%96%E5%AD%B8%E5%BC%8F" title="化學式 – chinois littéraire" lang="lzh" hreflang="lzh" data-title="化學式" data-language-autonym="文言" data-language-local-name="chinois littéraire" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/H%C3%B2a-ha%CC%8Dk-sek" title="Hòa-ha̍k-sek – minnan" lang="nan" hreflang="nan" data-title="Hòa-ha̍k-sek" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E5%8C%96%E5%AD%B8%E5%BC%8F" title="化學式 – cantonais" lang="yue" hreflang="yue" data-title="化學式" data-language-autonym="粵語" data-language-local-name="cantonais" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div 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data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Apparence</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">déplacer vers la barre latérale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">masquer</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Un article de Wikipédia, l'encyclopédie libre.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="fr" dir="ltr"><div id="softredirect" class="bandeau-container metadata homonymie hatnote softredirect"><div class="bandeau-cell bandeau-icone-css loupe" style="display:table-cell;padding-right:0.5em"> <p>Cet <a href="/wiki/Aide:Article_court" title="Aide:Article court">article court</a> présente un sujet plus développé dans : <a href="/wiki/Repr%C3%A9sentation_des_mol%C3%A9cules" title="Représentation des molécules">Représentation des molécules</a>. </p> </div></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fichier:Isobutane.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/9/98/Isobutane.png" decoding="async" width="214" height="186" class="mw-file-element" data-file-width="214" data-file-height="186" /></a><figcaption><a href="/wiki/Formule_d%C3%A9velopp%C3%A9e_plane" title="Formule développée plane">Formule développée plane</a> de l'<a href="/wiki/Isobutane" title="Isobutane">isobutane</a>.</figcaption></figure> <p>La <b>formule chimique</b> d'un <a href="/wiki/Compos%C3%A9_chimique" title="Composé chimique">composé chimique</a>, d'une <a href="/wiki/Esp%C3%A8ce_chimique" title="Espèce chimique">espèce chimique</a> ou d'un <a href="/wiki/Min%C3%A9ral" title="Minéral">minéral</a> est une expression indiquant quels <a href="/wiki/%C3%89l%C3%A9ment_chimique" title="Élément chimique">éléments</a>, et dans quelles proportions, constituent ce composé, cette <a href="/wiki/Entit%C3%A9_chimique" title="Entité chimique">entité</a> ou ce minéral (par exemple la <a href="/wiki/Formule_brute" title="Formule brute">formule brute</a> de l'<a href="/wiki/Eau" title="Eau">eau</a> est H<sub>2</sub>O<sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub>). Les formules chimiques obéissent à une certaine <a href="/wiki/Standardisation" title="Standardisation">standardisation</a>, afin de faciliter leur <span class="page_h"><a href="/wiki/Indexation#Documentation" class="mw-disambig" title="Indexation">indexation</a></span> et d'éviter les ambiguïtés. </p> <div class="mw-heading mw-heading2"><h2 id="Description">Description</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Formule_chimique&veaction=edit&section=1" title="Modifier la section : Description" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Formule_chimique&action=edit&section=1" title="Modifier le code source de la section : Description"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>En fonction des informations supplémentaires que la formule peut apporter, on distingue : </p> <ul><li>les <a href="/wiki/Formule_brute#Formules_empiriques" title="Formule brute">formules brutes empiriques</a>, simples juxtapositions des symboles des éléments constitutifs, avec pour chacun un nombre en indice, proportionnel à la <a href="/wiki/Fraction_molaire" title="Fraction molaire">fraction molaire</a> de l'élément dans la <a href="/wiki/Composition_chimique" title="Composition chimique">composition globale</a> (l'indice est omis s'il est égal à 1). Dans une formule empirique les symboles des éléments sont cités par <a href="/wiki/Classement_alphab%C3%A9tique" title="Classement alphabétique">ordre alphabétique</a>, à l'exception des composés contenant du <a href="/wiki/Carbone" title="Carbone">carbone</a>, auquel cas on cite d'abord les symboles C (carbone) puis H (<a href="/wiki/Hydrog%C3%A8ne" title="Hydrogène">hydrogène</a>), les autres symboles apparaissant ensuite par ordre alphabétique ;</li> <li>les formules moléculaires ;</li> <li>les <a href="/wiki/Formule_structurale" title="Formule structurale">formules structurales</a>, qui apportent une information plus ou moins complète sur la façon dont les atomes sont reliés entre eux et disposés dans l'espace ;</li> <li>les <a href="/wiki/Formule_structurale#Cas_particulier_des_composés_d'addition" title="Formule structurale">formules structurales des composés d'addition</a> représentant des composés ou des minéraux résultant de l'association d'un composé chimique et d'un <a href="/wiki/Adduit" title="Adduit">adduit</a> (<a href="/wiki/Eau" title="Eau">eau</a> H<sub>2</sub>O<sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub>, <a href="/wiki/Peroxyde_d%27hydrog%C3%A8ne" title="Peroxyde d'hydrogène">peroxyde d'hydrogène</a> H<sub>2</sub>O<sub>2</sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub>, <a href="/wiki/M%C3%A9thane" title="Méthane">méthane</a> CH<sub>4</sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub>, <a href="/wiki/Ammoniac" title="Ammoniac">ammoniac</a> NH<sub>3</sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub><sub></sub>, <abbr class="abbr" title="et cetera">etc.</abbr>)<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes_et_références"><span id="Notes_et_r.C3.A9f.C3.A9rences"></span>Notes et références</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Formule_chimique&veaction=edit&section=2" title="Modifier la section : Notes et références" class="mw-editsection-visualeditor"><span>modifier</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Formule_chimique&action=edit&section=2" title="Modifier le code source de la section : Notes et références"><span>modifier le code</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="references-small lower-alpha" style=""><div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a> </span><span class="reference-text">Ces formules apportent une information structurale, mais ce ne sont pas de véritables formules structurales quand pour le composé chimique et l'adduit on se contente d'une formule moléculaire.</span> </li> </ol></div> </div> <ul id="bandeau-portail" class="bandeau-portail"><li><span class="bandeau-portail-element"><span class="bandeau-portail-icone"><span class="noviewer" typeof="mw:File"><a href="/wiki/Portail:Chimie" title="Portail de la chimie"><img alt="icône décorative" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/59/Nuvola_apps_edu_science.svg/24px-Nuvola_apps_edu_science.svg.png" decoding="async" width="24" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/59/Nuvola_apps_edu_science.svg/36px-Nuvola_apps_edu_science.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/59/Nuvola_apps_edu_science.svg/48px-Nuvola_apps_edu_science.svg.png 2x" data-file-width="128" data-file-height="128" /></a></span></span> <span class="bandeau-portail-texte"><a href="/wiki/Portail:Chimie" title="Portail:Chimie">Portail de la chimie</a></span> </span></li> </ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; 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