{"id":4010,"date":"2018-03-10T09:12:15","date_gmt":"2018-03-10T08:12:15","guid":{"rendered":"http:\/\/agora.xtec.cat\/iesmontgri\/?p=4010"},"modified":"2018-03-10T09:12:15","modified_gmt":"2018-03-10T08:12:15","slug":"electro","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/iesmontgri\/motcurios\/electro\/","title":{"rendered":"ELECTR\u00d3"},"content":{"rendered":"<h4>Aquesta paraula procedeix del grec\u00a0\u1f24\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03bd, que significa \u00e0mbar.<\/h4>\n<h5>En f\u00edsica, l&#8217;electr\u00f3 (s\u00edmbol e-) \u00e9s una part\u00edcula elemental amb una c\u00e0rrega el\u00e8ctrica elemental negativa.\u00a0La c\u00e0rrega el\u00e8ctrica de l&#8217;electr\u00f3 tamb\u00e9 \u00e9s una c\u00e0rrega elemental, \u00e9s a dir, \u00e9s la m\u00e9s petita que existeix amb signe negatiu.\u00a0Els electrons es disposen en diferents orbitals al voltant del nucli dels \u00e0toms.<\/h5>\n<h5><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4013 alignright\" src=\"http:\/\/agora.xtec.cat\/iesmontgri\/wp-content\/uploads\/usu613\/2018\/02\/440px-Amber_hg.jpg\" alt=\"\" width=\"332\" height=\"278\" srcset=\"https:\/\/agora.xtec.cat\/iesmontgri\/wp-content\/uploads\/usu613\/2018\/02\/440px-Amber_hg.jpg 440w, https:\/\/agora.xtec.cat\/iesmontgri\/wp-content\/uploads\/usu613\/2018\/02\/440px-Amber_hg-300x250.jpg 300w\" sizes=\"auto, (max-width: 332px) 100vw, 332px\" \/><\/h5>\n<h5>Els grecs antics ( com el fil\u00f2sof i matem\u00e0ic Tales de Milet) es van adonar que <strong>l&#8217;ambre<\/strong> atreia petits objectes quan se&#8217;l fregava contra el p\u00e8l dels alguns animals.<\/h5>\n<h5>Juntament amb el llamp, aquest fenomen \u00e9s una de les primeres experi\u00e8ncies conegudes dels humans amb l&#8217;electricitat.<\/h5>\n<h5>El cient\u00edfic angl\u00e8s William Gilbert ( 1544-1603)\u00a0 va definir el terme \u00abelectricus\u00bb per referir-se a la propietat d&#8217;un objecte d&#8217;atraure petits objectes despr\u00e9s de ser fregat.<\/h5>\n<h5 style=\"text-align: left;\">Tant les paraules \u00abel\u00e8ctric\u00bb com \u00abelectricitat\u00bb deriven del llat\u00ed \u00ab\u0113lectrum\u00bb, que al seu torn prov\u00e9 de la paraula grega \u00ab\u03ae\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03bd\u00bb (\u00ab\u0113lektron\u00bb), que significa &#8216;ambre&#8217;.<\/h5>\n<h5><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4020 alignleft\" src=\"http:\/\/agora.xtec.cat\/iesmontgri\/wp-content\/uploads\/usu613\/2018\/02\/electron.jpg\" alt=\"\" width=\"348\" height=\"232\" srcset=\"https:\/\/agora.xtec.cat\/iesmontgri\/wp-content\/uploads\/usu613\/2018\/02\/electron.jpg 718w, https:\/\/agora.xtec.cat\/iesmontgri\/wp-content\/uploads\/usu613\/2018\/02\/electron-300x200.jpg 300w\" sizes=\"auto, (max-width: 348px) 100vw, 348px\" \/><\/h5>\n<h5><\/h5>\n<h5>L&#8217;exist\u00e8ncia de l&#8217;electr\u00f3 va ser postulada pel f\u00edsic irland\u00e8s G. Johnstone Stoney com una unitat de c\u00e0rrega en el camp de l&#8217; electroqu\u00edmica. Fou descobert per Joseph John Thomson l&#8217;any 1897 en el Laboratori Cavendish de la Universitat de Cambridge.<\/h5>\n<p>&nbsp;<\/p>\n<h5 style=\"text-align: right;\"><\/h5>\n<h5 style=\"text-align: right;\">Lina Vilamitjana<\/h5>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aquesta paraula procedeix del grec\u00a0\u1f24\u03bb\u03b5\u03ba\u03c4\u03c1\u03bf\u03bd, que significa \u00e0mbar. En f\u00edsica, l&#8217;electr\u00f3 (s\u00edmbol e-) \u00e9s una part\u00edcula elemental amb una c\u00e0rrega el\u00e8ctrica elemental negativa.\u00a0La c\u00e0rrega el\u00e8ctrica de l&#8217;electr\u00f3 tamb\u00e9 \u00e9s una c\u00e0rrega elemental, \u00e9s a dir, \u00e9s la m\u00e9s petita que existeix amb signe negatiu.\u00a0Els electrons es disposen en diferents orbitals al voltant del nucli dels [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4017,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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