{"id":6589,"date":"2013-08-30T04:11:15","date_gmt":"2013-08-30T08:41:15","guid":{"rendered":"https:\/\/seryhumano.com\/web\/?p=6589"},"modified":"2016-02-16T07:31:52","modified_gmt":"2016-02-16T12:01:52","slug":"el-ununpentium-llama-a-la-puerta-de-la-tabla-periodica","status":"publish","type":"post","link":"https:\/\/seryhumano.com\/web\/?p=6589","title":{"rendered":"El ununpentium llama a la puerta de la tabla peri\u00f3dica"},"content":{"rendered":"<p><a href=\"https:\/\/seryhumano.com\/web\/?attachment_id=6590\" rel=\"attachment wp-att-6590\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-6590\" src=\"https:\/\/seryhumano.com\/web\/wp-content\/uploads\/2013\/08\/descarga-32.jpg\" alt=\"descarga (32)\" width=\"300\" height=\"168\" \/><\/a>Con nombre \u2013provisional-\u00a0<i>ununpentium<\/i>, el elemento 115 ha sido sintetizado de nuevo, una d\u00e9cada despu\u00e9s de que fuera descubierto, y puede que ahora cumpla los requisitos oficiales necesarios para entrar en la tabla peri\u00f3dica de los elementos. De ser as\u00ed, ocupar\u00e1 el puesto 115, entre el flerovium (114) y el livermorium (116), reconocidos hace un par de a\u00f1os.<\/p>\n<p>El elemento 115 ha sido producido ahora en laboratorio por un equipo de la\u00a0Universidad de Lund\u00a0(Suecia), en colaboraci\u00f3n con expertos alemanes. Es superpesado (con n\u00famero at\u00f3mico superior a 112) y se desintegra inmediatamente. Hab\u00eda sido ya descubierto en 2003 por cient\u00edficos rusos y estadounidenses, que lograron crear unos pocos \u00e1tomos de\u00a0<i>ununpentium<\/i>\u00a0(desintegrados en mil\u00e9simas de segundo). Pero el hallazgo no fue suficiente para que el comit\u00e9 conjunto de la Uni\u00f3n Internacional de F\u00edsica Pura y Aplicada (IUPAP) y la correspondiente de Qu\u00edmica (IUPAC) lo aceptara en la tabla peri\u00f3dica, esperando a que se reprodujera el experimento de s\u00edntesis y se confirmara.<a href=\"https:\/\/seryhumano.com\/web\/?attachment_id=6592\" rel=\"attachment wp-att-6592\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-6592\" src=\"https:\/\/seryhumano.com\/web\/wp-content\/uploads\/2013\/08\/images-70.jpg\" alt=\"images (70)\" width=\"137\" height=\"151\" \/><\/a><\/p>\n<p>Ahora Dirk Rudolph y sus colegas explican en la revista\u00a0<i>Physical Review Letters<\/i>\u00a0que han sintetizado el elemento 115 bombardeando \u00e1tomos de americio-243 (que tiene en el n\u00facleo 95 protones) con iones de calcio-48 (con 20 protones). El\u00a0<i>ununpentium<\/i>, como en los experimentos anteriores, se desintegra casi al instante, pero los cient\u00edficos han podido demostrar la formaci\u00f3n del nuevo elemento midiendo las caracter\u00edsticas f\u00edsicas precisas de esa desintegraci\u00f3n.<\/p>\n<p>Otro elemento superpesado, el 113 hab\u00eda sido sintetizado a la vez que el 115 en los experimentos anteriores, en una colaboraci\u00f3n del\u00a0Laboratorio Nacional Lawrence Livermore\u00a0(EE UU) con el Laboratorio Flerov de Reacciones Nucleares (Dubna, Rusia). Ellos lograron dos is\u00f3topos del elemento 115 que sobrevivieron entre 30 y 80 milisegundos antes de desintegrarse en is\u00f3topos del elemento 113. Tambi\u00e9n este \u00faltimo est\u00e1 pendiente de entrada oficial en la tabla peri\u00f3dica de los elementos, pese a que el a\u00f1o pasado unos cient\u00edficos japoneses anunciaron su confirmaci\u00f3n.<\/p>\n<p>Ahora el comit\u00e9 internacional tendr\u00e1 que decidir sobre dos nuevos candidatos a entrar de la famosa tabla peri\u00f3dica de los elementos, que Dmitri Mendeleiev present\u00f3 en 1869, y se decidir\u00e1 el nombre definitivo. Los 10 a\u00f1os de espera para ser confirmado y bautizado no es demasiado tiempo, recuerda\u00a0<i>Los \u00c1ngeles Times<\/i>: el elemento 106 se descubri\u00f3 en 1974 y no se nombr\u00f3 oficialmente seaborgium hasta 23 a\u00f1os despu\u00e9s.<\/p>\n<p>seryhumano.com \/ Alicia Rivera<\/p>\n<p>Fuente: elpais.com<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Con nombre \u2013provisional-\u00a0ununpentium, el elemento 115 ha sido sintetizado de nuevo, una d\u00e9cada despu\u00e9s de que fuera descubierto, y puede que ahora cumpla los requisitos oficiales necesarios para entrar en la tabla peri\u00f3dica de los elementos. De ser as\u00ed, ocupar\u00e1 el puesto 115, entre el flerovium (114) y el livermorium (116), reconocidos hace un par&hellip;<\/p>\n","protected":false},"author":2,"featured_media":6601,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[110],"tags":[159,143,322,379,846,210,111,847],"class_list":["post-6589","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noticias","tag-ciencia","tag-concepto-del-proyecto","tag-cultura-del-ser","tag-educacion","tag-el-ununpentium-llama-a-la-puerta-de-la-tabla-periodica","tag-noticias","tag-slider","tag-tabla-periodica","category-110","description-off"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>El ununpentium llama a la puerta de la tabla peri\u00f3dica &#187; SeryHumano.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/seryhumano.com\/web\/?p=6589\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"El ununpentium llama a la puerta de la tabla peri\u00f3dica &#187; SeryHumano.com\" \/>\n<meta property=\"og:description\" content=\"Con nombre \u2013provisional-\u00a0ununpentium, el elemento 115 ha sido sintetizado de nuevo, una d\u00e9cada despu\u00e9s de que fuera descubierto, y puede que ahora cumpla los requisitos oficiales necesarios para entrar en la tabla peri\u00f3dica de los elementos. 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