{"id":8581,"date":"2023-09-11T03:15:00","date_gmt":"2023-09-11T02:15:00","guid":{"rendered":"https:\/\/exos.education\/fr\/exercice-sciences-atomes-structure-niveau-secondaire\/"},"modified":"2023-08-21T14:54:25","modified_gmt":"2023-08-21T13:54:25","slug":"exercice-sciences-atomes-structure-niveau-secondaire","status":"publish","type":"post","link":"https:\/\/exos.education\/fr\/exercice-sciences-atomes-structure-niveau-secondaire\/","title":{"rendered":"Exercice Sciences Atomes Structure Niveau Secondaire"},"content":{"rendered":"

**Cours : Structure de l’atome**<\/p>\n

1. Un atome est compos\u00e9 d’un noyau (compos\u00e9 de protons et de neutrons) et d’\u00e9lectrons qui gravitent autour.<\/p>\n

2. Le nombre de protons d\u00e9termine le num\u00e9ro atomique (Z) qui identifie un \u00e9l\u00e9ment chimique dans le tableau p\u00e9riodique.<\/p>\n

3. Les \u00e9lectrons se trouvent dans des niveaux d’\u00e9nergie appel\u00e9s couches \u00e9lectroniques.<\/p>\n

4. La masse totale d’un atome est tr\u00e8s proche du total des masses des neutrons et des protons puisque les \u00e9lectrons sont beaucoup plus l\u00e9gers.<\/p>\n

\"\u2728\" **Exercice – Probl\u00e8me sur la structure de l’atome**<\/p>\n

Consid\u00e9rez un \u00e9l\u00e9ment X avec une masse atomique A = 40, un num\u00e9ro atomique Z = 18, et localis\u00e9 \u00e0 la cinqui\u00e8me \u00e9tape du tableau p\u00e9riodique (c’est-\u00e0-dire que X pr\u00e9sente cinq couches \u00e9lectroniques). Veuillez r\u00e9pondre aux questions suivantes: <\/p>\n

\"1\ufe0f\u20e3\" Combien y a-t-il de protons en X? (2pts)<\/p>\n

\"2\ufe0f\u20e3\" Combien y a-t-il de neutrons en X? (2pts)<\/p>\n

\"3\ufe0f\u20e3\" Comment sont dispos\u00e9s les \u00e9lectrons dans cet atomes selon le mod\u00e8le quantique?(3pts)<\/p>\n

Note: Pour la question 3, rappelez-vous que chaque couche peut comporter deux fois son nombre en indice pour d\u00e9crire l’\u00e9tape du tableau p\u00e9riodique.<\/p>\n

**R\u00e9ponses**<\/p>\n

\"1\ufe0f\u20e3\" L’\u00e9l\u00e9ment X poss\u00e8de 18 protons car Z=18<\/p>\n

\"2\ufe0f\u20e3\" L’\u00e9l\u00e9ment X poss\u00e8de 22 neutrons car A-Z=22<\/p>\n

\"3\ufe0f\u20e3\" Selon le mod\u00e8le quantique : \u00c9tage _1_ comporte _2_ \u00e9lectrons, _\u00c9tage_ _2_ comporte _4_, \u00c9tage_ _3_ comporte _6_, \u00c9_alternative_rn_possible_tage__4_comte___8_e_space_or_equivalently_cldeduct_cycleo_How_are_students_adaptedtherewith_more_particles_<\/p>\n

Cet exercice est adapt\u00e9 aux \u00e9l\u00e8ves scolaris\u00e9s au secondaire niveau difficile car il leur donne une chance d’utiliser leurs connaissances sur les propri\u00e9t\u00e9s basiques des atomes tout en comprenant comment elles forment ensemble une entit\u00e9 fonctionnelle.<\/p>\n

**Titre: Exercice Sciences Atomes Structure Niveau Secondaire**<\/p>\n","protected":false},"excerpt":{"rendered":"

**Cours : Structure de l’atome** 1. Un atome est compos\u00e9 d’un noyau (compos\u00e9 de protons et de neutrons) et d’\u00e9lectrons qui gravitent autour. 2. Le nombre de protons d\u00e9termine le num\u00e9ro atomique (Z) qui identifie un \u00e9l\u00e9ment chimique dans le tableau p\u00e9riodique. 3. Les \u00e9lectrons se trouvent dans des niveaux d’\u00e9nergie appel\u00e9s couches \u00e9lectroniques. 4. […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[54,8,5,4,318,1],"tags":[],"class_list":["post-8581","post","type-post","status-publish","format-standard","hentry","category-2nde","category-sciences","category-niveaux","category-matieres","category-pas-dadaptation-particuliere","category-exercices-pedagogiques-imprimables-et-gratuits"],"_links":{"self":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8581","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/comments?post=8581"}],"version-history":[{"count":0,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8581\/revisions"}],"wp:attachment":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/media?parent=8581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/categories?post=8581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/tags?post=8581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}