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Oksidasjonstal – Wikipedia

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class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"><!-- CentralNotice --></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Nettstad"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Innhald" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Innhald</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">flytt til sidefeltet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">gøym</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Byrjinga</div> </a> </li> <li id="toc-Oksidasjonstalet_til_eit_atom" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Oksidasjonstalet_til_eit_atom"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Oksidasjonstalet til eit atom</span> </div> </a> <ul id="toc-Oksidasjonstalet_til_eit_atom-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Oksidasjonstalet_til_eit_grunnstoff" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Oksidasjonstalet_til_eit_grunnstoff"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Oksidasjonstalet til eit grunnstoff</span> </div> </a> <ul id="toc-Oksidasjonstalet_til_eit_grunnstoff-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Reglar_for_fastsetjing_av_oksidasjonstal" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Reglar_for_fastsetjing_av_oksidasjonstal"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Reglar for fastsetjing av oksidasjonstal</span> </div> </a> <ul id="toc-Reglar_for_fastsetjing_av_oksidasjonstal-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Vanlege_oksidasjonstal_hjå_ulike_grunnstoff" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Vanlege_oksidasjonstal_hjå_ulike_grunnstoff"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Vanlege oksidasjonstal hjå ulike grunnstoff</span> </div> </a> <ul id="toc-Vanlege_oksidasjonstal_hjå_ulike_grunnstoff-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Innhald" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Vis/skjul innhaldslista" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Vis/skjul innhaldslista</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Oksidasjonstal</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Gå til ein artikkel på eit anna språk. Tilgjengeleg på 80 språk" > <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-80" 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">80 språk</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Oksidasjonstall" title="Oksidasjonstall – norsk bokmål" lang="nb" hreflang="nb" data-title="Oksidasjonstall" data-language-autonym="Norsk bokmål" data-language-local-name="norsk bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Oxidationstal" title="Oxidationstal – svensk" lang="sv" hreflang="sv" data-title="Oxidationstal" data-language-autonym="Svenska" data-language-local-name="svensk" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Oxidationstrin" title="Oxidationstrin – dansk" lang="da" hreflang="da" data-title="Oxidationstrin" data-language-autonym="Dansk" data-language-local-name="dansk" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Oksidasietoestand" title="Oksidasietoestand – afrikaans" lang="af" hreflang="af" data-title="Oksidasietoestand" 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%AD%D8%A7%D9%84%D8%A9_%D8%A7%D9%84%D8%A3%D9%83%D8%B3%D8%AF%D8%A9" title="حالة الأكسدة – arabisk" lang="ar" hreflang="ar" data-title="حالة الأكسدة" data-language-autonym="العربية" data-language-local-name="arabisk" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Numero_d%27oxidaci%C3%B3n" title="Numero d&#039;oxidación – aragonsk" lang="an" hreflang="an" data-title="Numero d&#039;oxidación" data-language-autonym="Aragonés" data-language-local-name="aragonsk" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Est%C3%A1u_d%27oxidaci%C3%B3n" title="Estáu d&#039;oxidación – asturisk" lang="ast" hreflang="ast" data-title="Estáu d&#039;oxidación" data-language-autonym="Asturianu" data-language-local-name="asturisk" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-ban mw-list-item"><a href="https://ban.wikipedia.org/wiki/Paindikan_oksidasi" title="Paindikan oksidasi – balinesisk" lang="ban" hreflang="ban" data-title="Paindikan oksidasi" data-language-autonym="Basa Bali" data-language-local-name="balinesisk" class="interlanguage-link-target"><span>Basa Bali</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%9C%E0%A6%BE%E0%A6%B0%E0%A6%A3_%E0%A6%85%E0%A6%AC%E0%A6%B8%E0%A7%8D%E0%A6%A5%E0%A6%BE" title="জারণ অবস্থা – bengali" lang="bn" hreflang="bn" data-title="জারণ অবস্থা" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Sng-h%C3%B2a-s%C3%B2%CD%98" title="Sng-hòa-sò͘ – minnan" lang="nan" hreflang="nan" data-title="Sng-hòa-sò͘" 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-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%9E%D0%BA%D0%B8%D1%81%D0%BB%D0%B0%D0%BD%D1%8B%D1%83_%D0%B4%D3%99%D1%80%D3%99%D0%B6%D3%99%D2%BB%D0%B5" title="Окисланыу дәрәжәһе – basjkirsk" lang="ba" hreflang="ba" data-title="Окисланыу дәрәжәһе" data-language-autonym="Башҡортса" data-language-local-name="basjkirsk" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A1%D1%82%D1%83%D0%BF%D0%B5%D0%BD%D1%8C_%D0%B0%D0%BA%D1%96%D1%81%D0%BB%D0%B5%D0%BD%D0%BD%D1%8F" title="Ступень акіслення – belarusisk" lang="be" hreflang="be" data-title="Ступень акіслення" data-language-autonym="Беларуская" data-language-local-name="belarusisk" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A1%D1%82%D1%83%D0%BF%D0%B5%D0%BD%D1%8C_%D0%B7%D0%B0%D1%82%D0%BB%D1%8F%D0%BD%D0%B5%D0%BD%D1%8C%D0%BD%D1%8F" title="Ступень затляненьня – belarusisk (klassisk ortografi)" lang="be-tarask" hreflang="be-tarask" data-title="Ступень затляненьня" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="belarusisk (klassisk ortografi)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A1%D1%82%D0%B5%D0%BF%D0%B5%D0%BD_%D0%BD%D0%B0_%D0%BE%D0%BA%D0%B8%D1%81%D0%BB%D0%B5%D0%BD%D0%B8%D0%B5" title="Степен на окисление – bulgarsk" lang="bg" hreflang="bg" data-title="Степен на окисление" data-language-autonym="Български" data-language-local-name="bulgarsk" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Oksidacijsko_stanje" title="Oksidacijsko stanje – bosnisk" lang="bs" hreflang="bs" data-title="Oksidacijsko stanje" data-language-autonym="Bosanski" data-language-local-name="bosnisk" 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/Estat_d%27oxidaci%C3%B3" title="Estat d&#039;oxidació – katalansk" lang="ca" hreflang="ca" data-title="Estat d&#039;oxidació" data-language-autonym="Català" data-language-local-name="katalansk" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%9E%D0%BA%D1%81%D0%B8%D0%B4%D0%BB%D0%B0%D0%B2_%D0%BA%D0%B0%D0%BF%D0%B0%D1%88%C4%95" title="Оксидлав капашĕ – tsjuvansk" lang="cv" hreflang="cv" data-title="Оксидлав капашĕ" data-language-autonym="Чӑвашла" data-language-local-name="tsjuvansk" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Oxida%C4%8Dn%C3%AD_%C4%8D%C3%ADslo" title="Oxidační číslo – tsjekkisk" lang="cs" hreflang="cs" data-title="Oxidační číslo" data-language-autonym="Čeština" data-language-local-name="tsjekkisk" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Cyflwr_ocsidiad" title="Cyflwr ocsidiad – walisisk" lang="cy" hreflang="cy" data-title="Cyflwr ocsidiad" data-language-autonym="Cymraeg" data-language-local-name="walisisk" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D8%AD%D8%A7%D9%84%D8%A9_%D8%AF_%D9%84%D8%A3%D9%83%D8%B3%D8%AF%D8%A9" title="حالة د لأكسدة – marokkansk-arabisk" lang="ary" hreflang="ary" data-title="حالة د لأكسدة" data-language-autonym="الدارجة" data-language-local-name="marokkansk-arabisk" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-se mw-list-item"><a href="https://se.wikipedia.org/wiki/Oksiderenlohku" title="Oksiderenlohku – nordsamisk" lang="se" hreflang="se" data-title="Oksiderenlohku" data-language-autonym="Davvisámegiella" data-language-local-name="nordsamisk" class="interlanguage-link-target"><span>Davvisámegiella</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Oxidationszahl" title="Oxidationszahl – tysk" lang="de" hreflang="de" data-title="Oxidationszahl" data-language-autonym="Deutsch" data-language-local-name="tysk" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Oks%C3%BCdatsiooniaste" title="Oksüdatsiooniaste – estisk" lang="et" hreflang="et" data-title="Oksüdatsiooniaste" data-language-autonym="Eesti" data-language-local-name="estisk" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%91%CF%81%CE%B9%CE%B8%CE%BC%CF%8C%CF%82_%CE%BF%CE%BE%CE%B5%CE%AF%CE%B4%CF%89%CF%83%CE%B7%CF%82" title="Αριθμός οξείδωσης – gresk" lang="el" hreflang="el" data-title="Αριθμός οξείδωσης" data-language-autonym="Ελληνικά" data-language-local-name="gresk" 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/Oxidation_state" title="Oxidation state – engelsk" lang="en" hreflang="en" data-title="Oxidation state" data-language-autonym="English" data-language-local-name="engelsk" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Estado_de_oxidaci%C3%B3n" title="Estado de oxidación – spansk" lang="es" hreflang="es" data-title="Estado de oxidación" data-language-autonym="Español" data-language-local-name="spansk" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Oksidi%C4%9Da_nombro" title="Oksidiĝa nombro – esperanto" lang="eo" hreflang="eo" data-title="Oksidiĝa nombro" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Oxidazio-egoera" title="Oxidazio-egoera – baskisk" lang="eu" hreflang="eu" data-title="Oxidazio-egoera" data-language-autonym="Euskara" data-language-local-name="baskisk" 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/%D8%B9%D8%AF%D8%AF_%D8%A7%DA%A9%D8%B3%D8%A7%DB%8C%D8%B4" title="عدد اکسایش – persisk" lang="fa" hreflang="fa" data-title="عدد اکسایش" data-language-autonym="فارسی" data-language-local-name="persisk" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Nombre_d%27oxydation" title="Nombre d&#039;oxydation – fransk" lang="fr" hreflang="fr" data-title="Nombre d&#039;oxydation" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Oksidaasjetast%C3%A2n" title="Oksidaasjetastân – vestfrisisk" lang="fy" hreflang="fy" data-title="Oksidaasjetastân" data-language-autonym="Frysk" data-language-local-name="vestfrisisk" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Staid_ocsa%C3%ADdi%C3%BAch%C3%A1in" title="Staid ocsaídiúcháin – irsk" lang="ga" hreflang="ga" data-title="Staid ocsaídiúcháin" data-language-autonym="Gaeilge" data-language-local-name="irsk" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Estado_de_oxidaci%C3%B3n" title="Estado de oxidación – galisisk" lang="gl" hreflang="gl" data-title="Estado de oxidación" data-language-autonym="Galego" data-language-local-name="galisisk" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%82%B0%ED%99%94%EC%88%98" title="산화수 – koreansk" lang="ko" hreflang="ko" data-title="산화수" data-language-autonym="한국어" data-language-local-name="koreansk" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%95%D6%84%D5%BD%D5%AB%D5%A4%D5%A1%D6%81%D5%B4%D5%A1%D5%B6_%D5%A1%D5%BD%D5%BF%D5%AB%D5%B3%D5%A1%D5%B6" title="Օքսիդացման աստիճան – armensk" lang="hy" hreflang="hy" data-title="Օքսիդացման աստիճան" data-language-autonym="Հայերեն" data-language-local-name="armensk" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%91%E0%A4%95%E0%A5%8D%E0%A4%B8%E0%A5%80%E0%A4%95%E0%A4%B0%E0%A4%A3_%E0%A4%B8%E0%A4%82%E0%A4%96%E0%A5%8D%E0%A4%AF%E0%A4%BE" title="ऑक्सीकरण संख्या – hindi" lang="hi" hreflang="hi" data-title="ऑक्सीकरण संख्या" 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/Oksidacijski_broj" title="Oksidacijski broj – kroatisk" lang="hr" hreflang="hr" data-title="Oksidacijski broj" data-language-autonym="Hrvatski" data-language-local-name="kroatisk" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Bilangan_oksidasi" title="Bilangan oksidasi – indonesisk" lang="id" hreflang="id" data-title="Bilangan oksidasi" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesisk" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-xh mw-list-item"><a href="https://xh.wikipedia.org/wiki/I-oxidation_state" title="I-oxidation state – xhosa" lang="xh" hreflang="xh" data-title="I-oxidation state" data-language-autonym="IsiXhosa" data-language-local-name="xhosa" class="interlanguage-link-target"><span>IsiXhosa</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Oxunartala" title="Oxunartala – islandsk" lang="is" hreflang="is" data-title="Oxunartala" data-language-autonym="Íslenska" data-language-local-name="islandsk" 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/Stato_di_ossidazione" title="Stato di ossidazione – italiensk" lang="it" hreflang="it" data-title="Stato di ossidazione" data-language-autonym="Italiano" data-language-local-name="italiensk" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%93%D7%A8%D7%92%D7%AA_%D7%97%D7%9E%D7%A6%D7%95%D7%9F" title="דרגת חמצון – hebraisk" lang="he" hreflang="he" data-title="דרגת חמצון" data-language-autonym="עברית" data-language-local-name="hebraisk" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%9F%E1%83%90%E1%83%9C%E1%83%92%E1%83%95%E1%83%98%E1%83%A1_%E1%83%A0%E1%83%98%E1%83%AA%E1%83%AE%E1%83%95%E1%83%98" title="ჟანგვის რიცხვი – georgisk" lang="ka" hreflang="ka" data-title="ჟანგვის რიცხვი" data-language-autonym="ქართული" data-language-local-name="georgisk" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A2%D0%BE%D1%82%D1%8B%D2%93%D1%83_%D0%B4%D3%99%D1%80%D0%B5%D0%B6%D0%B5%D1%81%D1%96" title="Тотығу дәрежесі – kasakhisk" lang="kk" hreflang="kk" data-title="Тотығу дәрежесі" data-language-autonym="Қазақша" data-language-local-name="kasakhisk" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Degre_oksidasyon" title="Degre oksidasyon – haitisk" lang="ht" hreflang="ht" data-title="Degre oksidasyon" data-language-autonym="Kreyòl ayisyen" data-language-local-name="haitisk" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Oksid%C4%93%C5%A1anas_pak%C4%81pe" title="Oksidēšanas pakāpe – latvisk" lang="lv" hreflang="lv" data-title="Oksidēšanas pakāpe" data-language-autonym="Latviešu" data-language-local-name="latvisk" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Oksidacijos_laipsnis" title="Oksidacijos laipsnis – litauisk" lang="lt" hreflang="lt" data-title="Oksidacijos laipsnis" data-language-autonym="Lietuvių" data-language-local-name="litauisk" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-jbo mw-list-item"><a href="https://jbo.wikipedia.org/wiki/kijytcini" title="kijytcini – lojban" lang="jbo" hreflang="jbo" data-title="kijytcini" data-language-autonym="La .lojban." data-language-local-name="lojban" class="interlanguage-link-target"><span>La .lojban.</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Oxid%C3%A1ci%C3%B3s_sz%C3%A1m" title="Oxidációs szám – ungarsk" lang="hu" hreflang="hu" data-title="Oxidációs szám" data-language-autonym="Magyar" data-language-local-name="ungarsk" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9E%D0%BA%D1%81%D0%B8%D0%B4%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%B5%D0%BD_%D0%B1%D1%80%D0%BE%D1%98" title="Оксидационен број – makedonsk" lang="mk" hreflang="mk" data-title="Оксидационен број" data-language-autonym="Македонски" data-language-local-name="makedonsk" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Keadaan_pengoksidaan" title="Keadaan pengoksidaan – malayisk" lang="ms" hreflang="ms" data-title="Keadaan pengoksidaan" data-language-autonym="Bahasa Melayu" data-language-local-name="malayisk" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mdf mw-list-item"><a href="https://mdf.wikipedia.org/wiki/%D0%A8%D0%B0%D0%BF%D0%B0%D0%BC%D0%BE%D0%BC%D1%88%D0%BA%D0%B0%D1%81%D1%8C" title="Шапамомшкась – moksja" lang="mdf" hreflang="mdf" data-title="Шапамомшкась" data-language-autonym="Мокшень" data-language-local-name="moksja" class="interlanguage-link-target"><span>Мокшень</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%98%D1%81%D1%8D%D0%BB%D0%B4%D1%8D%D0%BB%D1%82%D0%B8%D0%B9%D0%BD_%D0%B7%D1%8D%D1%80%D1%8D%D0%B3" title="Исэлдэлтийн зэрэг – mongolsk" lang="mn" hreflang="mn" data-title="Исэлдэлтийн зэрэг" data-language-autonym="Монгол" data-language-local-name="mongolsk" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Oxidatietoestand" title="Oxidatietoestand – nederlandsk" lang="nl" hreflang="nl" data-title="Oxidatietoestand" data-language-autonym="Nederlands" data-language-local-name="nederlandsk" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E9%85%B8%E5%8C%96%E6%95%B0" title="酸化数 – japansk" lang="ja" hreflang="ja" data-title="酸化数" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Oksidlanish_darajasi" title="Oksidlanish darajasi – usbekisk" lang="uz" hreflang="uz" data-title="Oksidlanish darajasi" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="usbekisk" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%86%E0%A8%95%E0%A8%B8%E0%A9%80%E0%A8%95%E0%A8%B0%E0%A8%A8_%E0%A8%B8%E0%A9%B0%E0%A8%96%E0%A8%BF%E0%A8%86" title="ਆਕਸੀਕਰਨ ਸੰਖਿਆ – panjabi" lang="pa" hreflang="pa" data-title="ਆਕਸੀਕਰਨ ਸੰਖਿਆ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="panjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-blk mw-list-item"><a href="https://blk.wikipedia.org/wiki/Oxidation_number" title="Oxidation number – pa&#039;o" lang="blk" hreflang="blk" data-title="Oxidation number" data-language-autonym="ပအိုဝ်ႏဘာႏသာႏ" data-language-local-name="pa&#039;o" class="interlanguage-link-target"><span>ပအိုဝ်ႏဘာႏသာႏ</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Oxidatschoonstall" title="Oxidatschoonstall – lågtysk" lang="nds" hreflang="nds" data-title="Oxidatschoonstall" data-language-autonym="Plattdüütsch" data-language-local-name="lågtysk" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Stopie%C5%84_utlenienia" title="Stopień utlenienia – polsk" lang="pl" hreflang="pl" data-title="Stopień utlenienia" data-language-autonym="Polski" data-language-local-name="polsk" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Estado_de_oxida%C3%A7%C3%A3o" title="Estado de oxidação – portugisisk" lang="pt" hreflang="pt" data-title="Estado de oxidação" data-language-autonym="Português" data-language-local-name="portugisisk" 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/Num%C4%83r_de_oxidare" title="Număr de oxidare – rumensk" lang="ro" hreflang="ro" data-title="Număr de oxidare" data-language-autonym="Română" data-language-local-name="rumensk" 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%A1%D1%82%D0%B5%D0%BF%D0%B5%D0%BD%D1%8C_%D0%BE%D0%BA%D0%B8%D1%81%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F" title="Степень окисления – russisk" lang="ru" hreflang="ru" data-title="Степень окисления" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Oxidation_state" title="Oxidation state – enkel engelsk" lang="en-simple" hreflang="en-simple" data-title="Oxidation state" data-language-autonym="Simple English" data-language-local-name="enkel engelsk" 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/Oxida%C4%8Dn%C3%A9_%C4%8D%C3%ADslo" title="Oxidačné číslo – slovakisk" lang="sk" hreflang="sk" data-title="Oxidačné číslo" data-language-autonym="Slovenčina" data-language-local-name="slovakisk" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Oksidacijsko_stanje" title="Oksidacijsko stanje – slovensk" lang="sl" hreflang="sl" data-title="Oksidacijsko stanje" data-language-autonym="Slovenščina" data-language-local-name="slovensk" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%DA%98%D9%85%D8%A7%D8%B1%DB%95%DB%8C_%D8%A6%DB%86%DA%A9%D8%B3%D8%A7%D9%86" title="ژمارەی ئۆکسان – sorani" lang="ckb" hreflang="ckb" data-title="ژمارەی ئۆکسان" data-language-autonym="کوردی" data-language-local-name="sorani" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9E%D0%BA%D1%81%D0%B8%D0%B4%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%BE_%D1%81%D1%82%D0%B0%D1%9A%D0%B5" title="Оксидационо стање – serbisk" lang="sr" hreflang="sr" data-title="Оксидационо стање" data-language-autonym="Српски / srpski" data-language-local-name="serbisk" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Oksidacioni_broj" title="Oksidacioni broj – serbokroatisk" lang="sh" hreflang="sh" data-title="Oksidacioni broj" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbokroatisk" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Hapetusluku" title="Hapetusluku – finsk" lang="fi" hreflang="fi" data-title="Hapetusluku" data-language-autonym="Suomi" data-language-local-name="finsk" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%86%E0%AE%95%E0%AF%8D%E0%AE%9A%E0%AE%BF%E0%AE%9A%E0%AE%A9%E0%AF%87%E0%AE%B1%E0%AF%8D%E0%AE%B1_%E0%AE%A8%E0%AE%BF%E0%AE%B2%E0%AF%88" title="ஆக்சிசனேற்ற நிலை – tamil" lang="ta" hreflang="ta" data-title="ஆக்சிசனேற்ற நிலை" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%AA%E0%B8%96%E0%B8%B2%E0%B8%99%E0%B8%B0%E0%B8%AD%E0%B8%AD%E0%B8%81%E0%B8%8B%E0%B8%B4%E0%B9%80%E0%B8%94%E0%B8%8A%E0%B8%B1%E0%B8%99" title="สถานะออกซิเดชัน – thai" lang="th" hreflang="th" data-title="สถานะออกซิเดชัน" data-language-autonym="ไทย" data-language-local-name="thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Y%C3%BCkseltgenme_durumu" title="Yükseltgenme durumu – tyrkisk" lang="tr" hreflang="tr" data-title="Yükseltgenme durumu" data-language-autonym="Türkçe" data-language-local-name="tyrkisk" 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%A1%D1%82%D1%83%D0%BF%D1%96%D0%BD%D1%8C_%D0%BE%D0%BA%D0%B8%D1%81%D0%BD%D0%B5%D0%BD%D0%BD%D1%8F" title="Ступінь окиснення – ukrainsk" lang="uk" hreflang="uk" data-title="Ступінь окиснення" data-language-autonym="Українська" data-language-local-name="ukrainsk" 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/%D8%AA%DA%A9%D8%B3%DB%8C%D8%AF%DB%8C_%D8%B9%D8%AF%D8%AF" title="تکسیدی عدد – urdu" lang="ur" hreflang="ur" data-title="تکسیدی عدد" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Tr%E1%BA%A1ng_th%C3%A1i_oxy_h%C3%B3a" title="Trạng thái oxy hóa – vietnamesisk" lang="vi" hreflang="vi" data-title="Trạng thái oxy hóa" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesisk" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E6%B0%A7%E5%8C%96%E6%95%B8" title="氧化數 – klassisk kinesisk" lang="lzh" hreflang="lzh" data-title="氧化數" data-language-autonym="文言" data-language-local-name="klassisk kinesisk" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E6%B0%A7%E5%8C%96%E6%95%B0" title="氧化数 – wu" lang="wuu" hreflang="wuu" data-title="氧化数" 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-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E6%B0%A7%E5%8C%96%E6%95%B8" title="氧化數 – kantonesisk" lang="yue" hreflang="yue" data-title="氧化數" data-language-autonym="粵語" data-language-local-name="kantonesisk" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%B0%A7%E5%8C%96%E6%95%B0" title="氧化数 – kinesisk" lang="zh" hreflang="zh" data-title="氧化数" data-language-autonym="中文" data-language-local-name="kinesisk" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q484152#sitelinks-wikipedia" title="Endra 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vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Oksidasjonstal&amp;action=edit" title="Endre kjeldekoden til sida [e]" accesskey="e"><span>Endre wikiteksten</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Oksidasjonstal&amp;action=history"><span>Sjå historikken</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Ålment </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Spesial:Lenkjer_hit/Oksidasjonstal" title="Liste over alle wikisidene som har lenkjer hit [j]" accesskey="j"><span>Lenkjer hit</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Spesial:Relaterte_endringar/Oksidasjonstal" rel="nofollow" title="Nylege endringar på sider denne sida lenkjar til [k]" accesskey="k"><span>Relaterte endringar</span></a></li><li id="t-upload" class="mw-list-item"><a href="//commons.wikimedia.org/wiki/Special:UploadWizard?uselang=nn" title="Last opp filer [u]" accesskey="u"><span>Last opp fil</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Spesial:Spesialsider" title="Liste over spesialsider [q]" accesskey="q"><span>Spesialsider</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Oksidasjonstal&amp;oldid=2701320" title="Fast lenkje til denne versjonen av sida"><span>Fast lenkje</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Oksidasjonstal&amp;action=info" title="Meir informasjon om sida"><span>Sideinformasjon</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Spesial:Siter&amp;page=Oksidasjonstal&amp;id=2701320&amp;wpFormIdentifier=titleform" title="Informasjon om korleis ein siterer denne sida"><span>Siter denne sida</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Spesial:UrlShortener&amp;url=https%3A%2F%2Fnn.wikipedia.org%2Fwiki%2FOksidasjonstal"><span>Hent kort URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Spesial:QrCode&amp;url=https%3A%2F%2Fnn.wikipedia.org%2Fwiki%2FOksidasjonstal"><span>Last ned QR-kode</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Skriv ut/eksporter </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Spesial:Bok&amp;bookcmd=book_creator&amp;referer=Oksidasjonstal"><span>Opprett ei bok</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Spesial:DownloadAsPdf&amp;page=Oksidasjonstal&amp;action=show-download-screen"><span>Last ned som PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Oksidasjonstal&amp;printable=yes" title="Utskriftsversjon av sida [p]" accesskey="p"><span>Utskriftsversjon</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Sideverktøy"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Utsjånad"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Utsjånad</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">flytt til sidefeltet</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">gøym</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">Frå Wikipedia – det frie oppslagsverket</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="nn" dir="ltr"><p><b>Oksidasjonstal</b>, eller <b>oksidasjonstrinn</b>, er eit hjelpemiddel til å halda orden på elektronovergongar i ein <a href="/wiki/Redoksreaksjon" title="Redoksreaksjon">redoksreaksjon</a>; eit <a href="/wiki/Atom" title="Atom">atom</a> eller <a href="/wiki/Grunnstoff" title="Grunnstoff">grunnstoff</a> vert <a href="/wiki/Oksidasjon" title="Oksidasjon">oksidert</a> dersom oksidasjonstalet aukar og <a href="/wiki/Reduksjon" title="Reduksjon">redusert</a> dersom oksidasjonstalet minkar. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Oksidasjonstalet_til_eit_atom">Oksidasjonstalet til eit atom</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Oksidasjonstal&amp;veaction=edit&amp;section=1" title="Endre bolk: Oksidasjonstalet til eit atom" class="mw-editsection-visualeditor"><span>endre</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Oksidasjonstal&amp;action=edit&amp;section=1" title="Rediger kildekoden til seksjonen Oksidasjonstalet til eit atom"><span>endre wikiteksten</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Uformelt er <i>oksidasjonstalet til eit atom</i> <a href="/wiki/Ladning" title="Ladning">ladningen</a> til atomet dersom <a href="/wiki/Kjemisk_sambinding" title="Kjemisk sambinding">sambindinga</a> hadde vorte stykka opp i <a href="/wiki/Ion" title="Ion">ion</a>, slik at delte <a href="/wiki/Elektron" title="Elektron">elektron</a> vert fullstendig overførte til det atom med høgast <a href="/wiki/Elektronegativitet" title="Elektronegativitet">elektronegativitet</a>. Det vil med andre ord seia at dersom eit elektron i molekylet vert delt mellom to atom A og B, A med større elektronegativitet enn B, så skal det reknast som tilhøyrande A når me skal finna oksidasjonstalet til dei ulike atoma. Oksidasjonstal vert i nomenklaturen skildra ved hjelp av <a href="/wiki/Romartal" title="Romartal">romartal</a>. Til dømes har Fe<sup>3+</sup>, også kalla jern(III), oksidasjonstal III. Det er varierande praksis for om me nyttar + for positive oksdiasjonstal eller ei; +III. </p><p>I vatn, H<sub>2</sub>O, er elektronfordelinga H:O:H og oksygen er meir elektronegativ enn hydrogen. Når me skal finna oksidasjonstala til dei ulike atoma, så reknar me altså som om oksygenatoma har fått elektron dei deler med hydrogenatomet og at me har fylgjande ion: O<sup>2-</sup> og H<sup>+</sup>. Oksygenatomet har altså oksidasjonstal -II og hydrogenatoma har +I. </p> <div class="mw-heading mw-heading2"><h2 id="Oksidasjonstalet_til_eit_grunnstoff">Oksidasjonstalet til eit grunnstoff</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Oksidasjonstal&amp;veaction=edit&amp;section=2" title="Endre bolk: Oksidasjonstalet til eit grunnstoff" class="mw-editsection-visualeditor"><span>endre</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Oksidasjonstal&amp;action=edit&amp;section=2" title="Rediger kildekoden til seksjonen Oksidasjonstalet til eit grunnstoff"><span>endre wikiteksten</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>Oksidasjonstalet til eit grunnstoff</i> i ei sambinding er gjennomsnittet av oksidasjonstala til enkeltatoma av grunnstoffet. I H<sub>2</sub>O er begge hydrogenatoma likeverdige og oksidasjonstalet til hydrogen er altså I. </p><p>I <a href="/wiki/Etanol" title="Etanol">etanol</a>, CH<sub>3</sub>CH<sub>2</sub>OH, har karbonatoma ulike oksidasjonstal. Det eine karbonatomet er omgjeve av 3 hydrogenatom og eitt karbonatom, og har såleis tre ekstra elektron (frå hydrogen, som har lågare elektronegaitivitet) og dermed oksidasjonstal -III. Det andre karbonatomet er omgjeve av 2 hydrogenatom, eitt karbonatom og eitt oksygenatom, og har såleis berre eitt ekstra elektron (to frå hydrogen, men eitt elektron er gjeve vekk til oksygen) og dermed oksidasjonstal -I. Reknar me gjennomsnittet, så har karbon altså oksidasjonstal -II. </p> <div class="mw-heading mw-heading2"><h2 id="Reglar_for_fastsetjing_av_oksidasjonstal">Reglar for fastsetjing av oksidasjonstal</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Oksidasjonstal&amp;veaction=edit&amp;section=3" title="Endre bolk: Reglar for fastsetjing av oksidasjonstal" class="mw-editsection-visualeditor"><span>endre</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Oksidasjonstal&amp;action=edit&amp;section=3" title="Rediger kildekoden til seksjonen Reglar for fastsetjing av oksidasjonstal"><span>endre wikiteksten</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Oksidasjonstalet til eit enkeltatom kan finnast ved å studera bindingsoppbygginga av det enkelte molekylet og ta omsyn til ulik elektronegativitet. For å finna oksdiasjonstalet til eit grunnstoff, og iblant også til enkeltatom, så kan me nytta fylgjande reglar (i prioritert rekkefølgje): </p> <ol><li>Alle stoff i rein, elementær form har oksidasjonstal 0.</li> <li>Alle ion med eitt atom har oksidasjonstal lik <a href="/wiki/Ladning" title="Ladning">ladningen</a>.</li> <li>I eit fleiratomsstoff er summen av oksidasjonstala lik ladningen.</li> <li><a href="/wiki/Fluor" title="Fluor">Fluor</a> har oksidasjonstal -I.</li> <li><a href="/wiki/Hydrogen" title="Hydrogen">Hydrogen</a> har oksidasjonstal I, utanom i <a href="/w/index.php?title=Metallhydrid&amp;action=edit&amp;redlink=1" class="new" title="Metallhydrid (sida finst ikkje)">metallhydrid</a>, der oksidasjonstalet er -I</li> <li><a href="/wiki/Oksygen" title="Oksygen">Oksygen</a> har oksidasjonstal -II, utanom i <a href="/w/index.php?title=Peroksid&amp;action=edit&amp;redlink=1" class="new" title="Peroksid (sida finst ikkje)">peroksid</a>, der oksidasjonstalet er -I</li> <li><a href="/wiki/Alkalimetall" title="Alkalimetall">Alkalimetall</a> har oksidasjonstal I</li> <li><a href="/wiki/Jordalkalimetall" title="Jordalkalimetall">Jordalkalimetall</a> har oksidasjonstal II</li></ol> <p>Døme: Etanol - C<sub>2</sub>H<sub>6</sub>O. Hydrogen har oksidasjontal +I og oksygen -II, medan karbon har oksidasjonstal x (ukjent inntil vidare). Ved den tredje regelen er då 0 = 2x + 6*1 + 2*(-2) = 2x + 2, det vil seia at x = -I. </p> <div class="mw-heading mw-heading2"><h2 id="Vanlege_oksidasjonstal_hjå_ulike_grunnstoff"><span id="Vanlege_oksidasjonstal_hj.C3.A5_ulike_grunnstoff"></span>Vanlege oksidasjonstal hjå ulike grunnstoff</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Oksidasjonstal&amp;veaction=edit&amp;section=4" title="Endre bolk: Vanlege oksidasjonstal hjå ulike grunnstoff" class="mw-editsection-visualeditor"><span>endre</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Oksidasjonstal&amp;action=edit&amp;section=4" title="Rediger kildekoden til seksjonen Vanlege oksidasjonstal hjå ulike grunnstoff"><span>endre wikiteksten</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Eit grunnstoff kan ha mange ulike oksidasjonstal, avhengig av kva sambindingar dei er i. Til dømes kan nitrogen ha oksidasjonstrinn -III, -II, +III, +IV og V, medan jern kan ha oksdiasjonstrinn II og III, men også IV og VI. </p><p>For nokre grunnstoff er enkelte oksidasjonstal spesielt vanlege. Sjå til dømes reglane 4-8 for fastsetjing av oksidasjonstrinn. 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