{"id":2732,"date":"2025-08-12T14:25:37","date_gmt":"2025-08-12T11:25:37","guid":{"rendered":"https:\/\/cedra.academy\/?p=2732"},"modified":"2025-10-01T14:40:56","modified_gmt":"2025-10-01T11:40:56","slug":"atomul-informatii-ppt-fise-de-lucru","status":"publish","type":"post","link":"https:\/\/cedra.academy\/?p=2732","title":{"rendered":"Atomul (Informa\u021bii, PPT, fi\u0219e de lucru)"},"content":{"rendered":"\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><\/figure>\n\n\n\n<div class=\"wp-block-file\"><object class=\"wp-block-file__embed\" data=\"https:\/\/cedra.academy\/wp-content\/uploads\/2025\/10\/Fise-de-lucru-la-tema-Atomul.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"\u00cenglobare pentru Fise-de-lucru-la-tema-Atomul.\"><\/object><a id=\"wp-block-file--media-20a13c84-8a6a-450c-af35-16b741bfff4f\" href=\"https:\/\/cedra.academy\/wp-content\/uploads\/2025\/10\/Fise-de-lucru-la-tema-Atomul.pdf\">Fise-de-lucru-la-tema-Atomul<\/a><a href=\"https:\/\/cedra.academy\/wp-content\/uploads\/2025\/10\/Fise-de-lucru-la-tema-Atomul.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-20a13c84-8a6a-450c-af35-16b741bfff4f\">Descarc\u0103<\/a><\/div>\n\n\n\n<div class=\"wp-block-file\"><object class=\"wp-block-file__embed\" data=\"https:\/\/cedra.academy\/wp-content\/uploads\/2025\/10\/Atomul.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"\u00cenglobare pentru Atomul.\"><\/object><a id=\"wp-block-file--media-433c89dd-8996-41a1-9ea6-8a679f888e82\" href=\"https:\/\/cedra.academy\/wp-content\/uploads\/2025\/10\/Atomul.pdf\">Atomul<\/a><a href=\"https:\/\/cedra.academy\/wp-content\/uploads\/2025\/10\/Atomul.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-433c89dd-8996-41a1-9ea6-8a679f888e82\">Descarc\u0103<\/a><\/div>\n\n\n\n<p><\/p>\n\n\n\n<p>Atomul reprezint\u0103 cea mai mic\u0103 particul\u0103 a unei substan\u021be care \u00ee\u0219i p\u0103streaz\u0103 propriet\u0103\u021bile chimice. Denumirea sa provine din grecescul <em>atomos<\/em>, care \u00eenseamn\u0103 \u201eindivizibil\u201d. De\u0219i mult timp s-a crezut c\u0103 atomul nu poate fi divizat, cercet\u0103rile moderne au ar\u0103tat c\u0103 el este alc\u0103tuit din particule mai mici \u2013 protoni, neutroni \u0219i electroni.<\/p>\n\n\n\n<p>Structura atomului este format\u0103 din <strong>nucleu<\/strong> \u0219i <strong>\u00eenveli\u0219 electronic<\/strong>. Nucleul, aflat \u00een centrul atomului, con\u021bine protoni (cu sarcin\u0103 pozitiv\u0103) \u0219i neutroni (f\u0103r\u0103 sarcin\u0103 electric\u0103). \u00cen jurul nucleului se afl\u0103 electronii, care se mi\u0219c\u0103 pe diferite niveluri de energie \u0219i au sarcin\u0103 negativ\u0103. Datorit\u0103 echilibrului dintre protoni \u0219i electroni, atomul este, \u00een mod normal, neutru din punct de vedere electric.<\/p>\n\n\n\n<p>Fiecare element chimic se deosebe\u0219te de celelalte prin <strong>num\u0103rul de protoni din nucleu<\/strong>, numit num\u0103r atomic. De exemplu, hidrogenul are un proton, heliul doi protoni, iar oxigenul opt. Propriet\u0103\u021bile chimice ale unui element depind de structura electronic\u0103 a atomilor s\u0103i, adic\u0103 de modul \u00een care electronii sunt distribui\u021bi pe straturile energetice.<\/p>\n\n\n\n<p>Atomul este fundamentul \u00eentregii materii. Toate substan\u021bele din jurul nostru \u2013 solide, lichide sau gaze \u2013 sunt alc\u0103tuite din atomi care se leag\u0103 \u00eentre ei pentru a forma molecule sau re\u021bele cristaline. Studiul atomului a stat la baza dezvolt\u0103rii chimiei moderne, a fizicii nucleare \u0219i a tehnologiilor care au schimbat profund via\u021ba omenirii.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"843\" height=\"908\" data-id=\"2740\" src=\"https:\/\/cedra.academy\/wp-content\/uploads\/2025\/10\/Atomu-1.png\" alt=\"\" class=\"wp-image-2740\" srcset=\"https:\/\/cedra.academy\/wp-content\/uploads\/2025\/10\/Atomu-1.png 843w, https:\/\/cedra.academy\/wp-content\/uploads\/2025\/10\/Atomu-1-279x300.png 279w, https:\/\/cedra.academy\/wp-content\/uploads\/2025\/10\/Atomu-1-768x827.png 768w\" sizes=\"(max-width: 843px) 100vw, 843px\" \/><\/figure>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Atomul reprezint\u0103 cea mai mic\u0103 particul\u0103 a unei substan\u021be care \u00ee\u0219i p\u0103streaz\u0103 propriet\u0103\u021bile chimice. Denumirea sa provine din grecescul atomos, care \u00eenseamn\u0103 \u201eindivizibil\u201d. De\u0219i mult timp s-a crezut c\u0103 atomul [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2737,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,18,10],"tags":[],"_links":{"self":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/2732"}],"collection":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2732"}],"version-history":[{"count":4,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/2732\/revisions"}],"predecessor-version":[{"id":2742,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/2732\/revisions\/2742"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/media\/2737"}],"wp:attachment":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2732"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2732"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}