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class="mw-indicators"> </div> </div> <div id="contentSub"><div id="mw-content-subtitle">← <a href="/wiki/Elementu_sint%C3%A9ticu" title="Elementu sintéticu">Elementu sintéticu</a></div></div> <div id="mw-content-text" class="mw-body-content"><p>Nun tienes permisu pa editar esta páxina pol siguiente motivu: </p> <div class="permissions-errors"><div class="mw-permissionerror-globalblocking-blockedtext-range"><b>Tu dirección IP forma parte de un rango de direcciones que se encuentra <a href="https://meta.wikimedia.org/wiki/Special:MyLanguage/Global_blocks" class="extiw" title="m:Special:MyLanguage/Global blocks">bloqueado en todas las wikis de Wikimedia</a>.</b> <p>El bloqueo fue realizado por <a href="/wiki/Usuariu:Jon_Kolbert" title="Usuariu:Jon Kolbert">‪Jon Kolbert‬</a>. 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También puede enviar un correo electrónico a la cola <a href="https://meta.wikimedia.org/wiki/Special:MyLanguage/VRT" class="extiw" title="m:Special:MyLanguage/VRT">VRT</a> de <a href="https://meta.wikimedia.org/wiki/Special:MyLanguage/Stewards" class="extiw" title="m:Special:MyLanguage/Stewards">stewards</a> a <kbd>stewards@wikimedia.org</kbd> incluyendo todos los detalles anteriores.</div></div><hr /> <p>Pues ver y copiar la fonte d'esta páxina. </p><textarea readonly="" accesskey="," id="wpTextbox1" cols="80" rows="25" style="" class="mw-editfont-monospace" lang="ast" dir="ltr" name="wpTextbox1">==Propiedaes== Los elementos sintéticos son [[radiactivos]] y se [[Desintegración radiactiva|desintegran]] rápido n'otros elementos llixeros, que tienen [[vida media|vides medies]] tan curties en comparanza cola edá de la [[Tierra]] (que se formó hai aproximao {{unidá|4600|millones}} d'años), que cualquier átomu d'estos elementos que pudiera esistir cuando se formó'l planeta hai enforma tiempu que s'hai desintegráu. Los átomos de los elementos sintéticos namái se producen na Tierra por aciu esperimentos qu'arreyen a reactores nucleares o [[acelerador de partícules|aceleradores de partícules]], via [[fusión nuclear]] o [[captura neutrónica|absorción de neutrón]] de masa absorption. La [[masa atómico]] pa la vida natural basar na bayura media ponderada de los isótopos naturales que se producen na corteza y atmósfera de la Tierra. Pa los elementos ''sintéticos'', l'isótopu depende de los medios de síntesis, polo que'l conceutu de la bayura isotópica natural nun tien sentíu. Poro, pa los elementos sintéticos el recuentu total del nucleu ([[protones]] y [[neutrones]]) del isótopu más estable, esto ye, l'isótopu cola vida media más llarga numbérense como masa atómico ente llaves (<nowiki>[ ]</nowiki>). Non tolos elementos radioactivos son sintéticos. Por casu, el [[uraniu]] y el [[toriu]] nun tienen isótopos estables, pero producir de forma natural na corteza y na atmósfera de la Tierra. Otros elementos inestables, como'l [[poloniu]], [[radiu (elementu)|radiu]] y [[radón]] —que se formen al traviés de la desintegración del uraniu y del toriu— tamién s'atopen na naturaleza, a pesar de les sos curties vides medies. El plutoniu ye un valor atípicu: la so vida media, dependiendo del isótopu, puede llegar a 80,8 millones d'años. (El ''principal'' isótopu de plutoniu n'usu tien una vida media de 24.100 años.) </textarea><div class="templatesUsed"></div><p id="mw-returnto">Volver a <a href="/wiki/Elementu_sint%C3%A9ticu" title="Elementu sintéticu">Elementu sintéticu</a>.</p> <noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Sacáu de «<a dir="ltr" href="https://ast.wikipedia.org/wiki/Elementu_sintéticu">https://ast.wikipedia.org/wiki/Elementu_sintéticu</a>»</div></div> <div id="catlinks" class="catlinks catlinks-allhidden" data-mw="interface"></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy/es">Política d'intimidá</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:Tocante_a">Tocante a Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:Avisu_xeneral">Avisu llegal</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Códigu de conducta</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Desendolcadores</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/ast.wikipedia.org">Estadístiques</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement/es">Declaración de cookies</a></li> <li id="footer-places-mobileview"><a href="//ast.m.wikipedia.org/w/index.php?title=Elementu_sint%C3%A9ticu&action=edit&section=1&mobileaction=toggle_view_mobile" class="noprint stopMobileRedirectToggle">Vista pa móvil</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://wikimediafoundation.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/static/images/footer/wikimedia-button.svg" width="84" height="29" alt="Wikimedia Foundation" loading="lazy"></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/w/resources/assets/poweredby_mediawiki.svg" alt="Powered by MediaWiki" width="88" height="31" loading="lazy"></a></li> </ul> </footer> </div> </div> </div> <div class="vector-settings" id="p-dock-bottom"> <ul></ul> </div><script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-6b8d669998-4mcwx","wgBackendResponseTime":180,"wgPageParseReport":{"limitreport":{"cputime":"0.004","walltime":"0.017","ppvisitednodes":{"value":17,"limit":1000000},"postexpandincludesize":{"value":806,"limit":2097152},"templateargumentsize":{"value":0,"limit":2097152},"expansiondepth":{"value":2,"limit":100},"expensivefunctioncount":{"value":0,"limit":500},"unstrip-depth":{"value":0,"limit":20},"unstrip-size":{"value":0,"limit":5000000},"entityaccesscount":{"value":0,"limit":400},"timingprofile":["100.00% 0.000 1 -total"]},"cachereport":{"origin":"mw-web.codfw.main-6b8d669998-4mcwx","timestamp":"20241128091027","ttl":2592000,"transientcontent":false}}});});</script> </body> </html>