Ch\u01b0\u01a1ng 7 - B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n<\/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:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 7 - B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 180 SGK V\u1eadt L\u00fd 12)\u00a0Trong c\u00e1c c\u00e2u sau, c\u00e2u n\u00e0o \u0111\u00fang? C\u00e2u n\u00e0o sai? 1. K\u00edch th\u01b0\u1edbc h\u1ea1t nh\u00e2n t\u1ec9 l\u1ec7 v\u1edbi s\u1ed1 nuclon A. 2. C\u00e1c h\u1ea1t nh\u00e2n \u0111\u1ed3ng v\u1ecb c\u00f3 c\u00f9ng s\u1ed1 proton. 3. C\u00e1c h\u1ea1t nh\u00e2n \u0111\u1ed3ng v\u1ecb c\u00f3 c\u00f9ng s\u1ed1 nuclon. 4. \u0110i\u1ec7n t\u00edch h\u1ea1t nh\u00e2n t\u1ec9 l\u1ec7 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/\" \/>\n<meta property=\"og:site_name\" content=\"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12 l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam\" \/>\n<meta property=\"article:published_time\" content=\"2018-03-30T04:14:27+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-564.png\" \/>\n\t<meta property=\"og:image:width\" content=\"224\" \/>\n\t<meta property=\"og:image:height\" content=\"127\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"H\u00e0 Trang\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"H\u00e0 Trang\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/\",\"url\":\"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/\",\"name\":\"Ch\u01b0\u01a1ng 7 - B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n\",\"isPartOf\":{\"@id\":\"https:\/\/lop12.edu.vn\/#website\"},\"datePublished\":\"2018-03-30T04:14:27+00:00\",\"dateModified\":\"2018-03-30T04:14:27+00:00\",\"author\":{\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45\"},\"breadcrumb\":{\"@id\":\"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/lop12.edu.vn\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Ch\u01b0\u01a1ng 7 – B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/lop12.edu.vn\/#website\",\"url\":\"https:\/\/lop12.edu.vn\/\",\"name\":\"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/lop12.edu.vn\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45\",\"name\":\"H\u00e0 Trang\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g\",\"caption\":\"H\u00e0 Trang\"},\"url\":\"https:\/\/lop12.edu.vn\/author\/trangvth2\/\"}]}<\/script>\n","yoast_head_json":{"title":"Ch\u01b0\u01a1ng 7 - B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/","og_locale":"en_US","og_type":"article","og_title":"Ch\u01b0\u01a1ng 7 - B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n","og_description":"B\u00e0i 1 (trang 180 SGK V\u1eadt L\u00fd 12)\u00a0Trong c\u00e1c c\u00e2u sau, c\u00e2u n\u00e0o \u0111\u00fang? 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C\u00e1c h\u1ea1t nh\u00e2n \u0111\u1ed3ng v\u1ecb c\u00f3 c\u00f9ng s\u1ed1 nuclon. 4. \u0110i\u1ec7n t\u00edch h\u1ea1t nh\u00e2n t\u1ec9 l\u1ec7 […]","og_url":"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/","og_site_name":"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12 l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam","article_published_time":"2018-03-30T04:14:27+00:00","og_image":[{"width":224,"height":127,"url":"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-564.png","type":"image\/png"}],"author":"H\u00e0 Trang","twitter_card":"summary_large_image","twitter_misc":{"Written by":"H\u00e0 Trang","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/","url":"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/","name":"Ch\u01b0\u01a1ng 7 - B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n","isPartOf":{"@id":"https:\/\/lop12.edu.vn\/#website"},"datePublished":"2018-03-30T04:14:27+00:00","dateModified":"2018-03-30T04:14:27+00:00","author":{"@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45"},"breadcrumb":{"@id":"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/lop12.edu.vn\/"},{"@type":"ListItem","position":2,"name":"Ch\u01b0\u01a1ng 7 – B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n"}]},{"@type":"WebSite","@id":"https:\/\/lop12.edu.vn\/#website","url":"https:\/\/lop12.edu.vn\/","name":"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/lop12.edu.vn\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45","name":"H\u00e0 Trang","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g","caption":"H\u00e0 Trang"},"url":"https:\/\/lop12.edu.vn\/author\/trangvth2\/"}]}},"_links":{"self":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/24656"}],"collection":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/comments?post=24656"}],"version-history":[{"count":1,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/24656\/revisions"}],"predecessor-version":[{"id":24665,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/24656\/revisions\/24665"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media\/24657"}],"wp:attachment":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media?parent=24656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/categories?post=24656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/tags?post=24656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":24656,"date":"2018-03-30T11:14:27","date_gmt":"2018-03-30T04:14:27","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=24656"},"modified":"2018-03-30T11:14:27","modified_gmt":"2018-03-30T04:14:27","slug":"chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/","title":{"rendered":"Ch\u01b0\u01a1ng 7 – B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n"},"content":{"rendered":"

B\u00e0i 1 (trang 180 SGK V\u1eadt L\u00fd 12)<\/b>\u00a0Trong c\u00e1c c\u00e2u sau, c\u00e2u n\u00e0o \u0111\u00fang? C\u00e2u n\u00e0o sai?<\/span><\/p>\n

1. K\u00edch th\u01b0\u1edbc h\u1ea1t nh\u00e2n t\u1ec9 l\u1ec7 v\u1edbi s\u1ed1 nuclon A.<\/p>\n

2. C\u00e1c h\u1ea1t nh\u00e2n \u0111\u1ed3ng v\u1ecb c\u00f3 c\u00f9ng s\u1ed1 proton.<\/p>\n

3. C\u00e1c h\u1ea1t nh\u00e2n \u0111\u1ed3ng v\u1ecb c\u00f3 c\u00f9ng s\u1ed1 nuclon.<\/p>\n

4. \u0110i\u1ec7n t\u00edch h\u1ea1t nh\u00e2n t\u1ec9 l\u1ec7 v\u1edbi s\u1ed1 proton.<\/p>\n

5. M\u1ed9t h\u1ea1t nh\u00e2n c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1u th\u00ec s\u1ebd c\u00f3 n\u0103ng l\u01b0\u1ee3ng t\u01b0\u01a1ng \u1ee9ng 931,5 MeV.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

1. K\u00edch th\u01b0\u1edbc h\u1ea1t nh\u00e2n t\u1ec9 l\u1ec7 v\u1edbi s\u1ed1 nuclon A. Sai<\/p>\n

2. C\u00e1c h\u1ea1t nh\u00e2n \u0111\u1ed3ng v\u1ecb c\u00f3 c\u00f9ng s\u1ed1 proton. \u0110\u00fang<\/p>\n

3. C\u00e1c h\u1ea1t nh\u00e2n \u0111\u1ed3ng v\u1ecb c\u00f3 c\u00f9ng s\u1ed1 nuclon. Sai<\/p>\n

4. \u0110i\u1ec7n t\u00edch h\u1ea1t nh\u00e2n t\u1ec9 l\u1ec7 v\u1edbi s\u1ed1 proton. \u0110\u00fang<\/p>\n

V\u00ec h\u1ea1t nh\u00e2n c\u00f3 c\u00f9ng Z proton th\u00ec c\u00f3 \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng b\u1eb1ng +Ze<\/p>\n

5. M\u1ed9t h\u1ea1t nh\u00e2n c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1u th\u00ec s\u1ebd c\u00f3 n\u0103ng l\u01b0\u1ee3ng t\u01b0\u01a1ng \u1ee9ng 931,5 MeV. \u0110\u00fang<\/p>\n

$\"\"$ <\/p>\n

B\u00e0i 2 (trang 180 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0C\u00e1c h\u1ea1t nh\u00e2n c\u00f3 c\u00f9ng s\u1ed1 A v\u00e0 kh\u00e1c s\u1ed1 Z …<\/span><\/p>\n

$\"\"$ <\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Hai h\u1ea1t nh\u00e2n n\u00e0y c\u00f3 c\u00f9ng s\u1ed1 kh\u1ed1i n\u00ean c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng g\u1ea7n b\u1eb1ng nhau nh\u01b0ng kh\u00e1c s\u1ed1 Z n\u00ean c\u00f3 s\u1ed1 \u0111i\u1ec7n t\u00edch kh\u00e1c nhau.<\/p>\n

H\u1ea1t nh\u00e2n S c\u00f3 \u0111i\u1ec7n t\u00edch b\u1eb1ng +13e<\/p>\n

H\u1ea1t nh\u00e2n Ar c\u00f3 \u0111i\u1ec7n t\u00edch b\u1eb1ng +18e.<\/p>\n

B\u00e0i 3 (trang 180 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0X\u00e1c \u0111\u1ecbnh kh\u1ed1i l\u01b0\u1ee3ng t\u00ednh ra u c\u1ee7a …<\/span><\/p>\n

$\"\"$ <\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

$\"\"$ <\/p>\n

B\u00e0i 4 (trang 180 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Ch\u1ecdn c\u00e2u \u0111\u00fang.<\/span><\/p>\n

T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a m\u1ed9t nguy\u00ean t\u1eed ph\u1ee5 thu\u1ed9c:<\/p>\n

A. Nguy\u00ean t\u1eed s\u1ed1<\/p>\n

B. S\u1ed1 kh\u1ed1i<\/p>\n

C. kh\u1ed1i l\u01b0\u1ee3ng nguy\u00ean t\u1eed.<\/p>\n

D. S\u1ed1 c\u00e1c \u0111\u1ed3ng v\u1ecb<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn \u0111\u00e1p \u00e1n A<\/p>\n

V\u00ec nguy\u00ean t\u1eed s\u1ed1 Z l\u00e0 s\u1ed1 th\u1ee9 t\u1ef1 c\u1ee7a nguy\u00ean t\u1ed1 trong b\u1ea3ng ph\u00e2n lo\u1ea1i tu\u1ea7n ho\u00e0n.<\/p>\n

B\u00e0i 5 (trang 180 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Ch\u1ecdn c\u00e2u \u0111\u00fang.<\/span><\/p>\n

C\u00e1c \u0111\u1ed3ng v\u1ecb c\u1ee7a c\u00f9ng m\u1ed9t nguy\u00ean t\u1ed1 c\u00f3 c\u00f9ng:<\/p>\n

A. S\u1ed1 proton<\/p>\n

B. S\u1ed1 n\u01a1tron<\/p>\n

C. s\u1ed1 nuclon<\/p>\n

D. Kh\u1ed1i l\u01b0\u1ee3ng nguy\u00ean t\u1eed<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn \u0111\u00e1p \u00e1n A.<\/p>\n

V\u00ec h\u1ea1t nh\u00e2n \u0111\u1ed3ng v\u1ecb l\u00e0 c\u00e1c h\u1ea1t c\u00f3 c\u00f9ng s\u1ed1 proton v\u00e0 kh\u00e1c nhau s\u1ed1 n\u01a1tron.<\/p>\n

B\u00e0i 6 (trang 180 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Ch\u1ecdn c\u00e2u \u0111\u00fang:<\/span><\/p>\n

$\"\"$ <\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn \u0111\u00e1p \u00e1n C.<\/p>\n

$\"\"$ <\/p>\n

B\u00e0i 7 (trang 180 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0S\u1ed1 n\u01a1tron trong h\u1ea1t nh\u00e2n …<\/span><\/p>\n

$\"\"$ <\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn \u0111\u00e1p \u00e1n B.<\/p>\n

$\"\"$ <\/p>\n","protected":false},"excerpt":{"rendered":"

B\u00e0i 1 (trang 180 SGK V\u1eadt L\u00fd 12)\u00a0Trong c\u00e1c c\u00e2u sau, c\u00e2u n\u00e0o \u0111\u00fang? C\u00e2u n\u00e0o sai? 1. K\u00edch th\u01b0\u1edbc h\u1ea1t nh\u00e2n t\u1ec9 l\u1ec7 v\u1edbi s\u1ed1 nuclon A. 2. C\u00e1c h\u1ea1t nh\u00e2n \u0111\u1ed3ng v\u1ecb c\u00f3 c\u00f9ng s\u1ed1 proton. 3. C\u00e1c h\u1ea1t nh\u00e2n \u0111\u1ed3ng v\u1ecb c\u00f3 c\u00f9ng s\u1ed1 nuclon. 4. \u0110i\u1ec7n t\u00edch h\u1ea1t nh\u00e2n t\u1ec9 l\u1ec7 […]<\/p>\n","protected":false},"author":3,"featured_media":24657,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1303],"tags":[1428,1427],"yoast_head":"\nCh\u01b0\u01a1ng 7 - B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n<\/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:\/\/lop12.edu.vn\/chuong-7-bai-35-tinh-chat-va-cau-tao-hat-nhan\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 7 - B\u00e0i 35: T\u00ednh ch\u1ea5t v\u00e0 c\u1ea5u t\u1ea1o h\u1ea1t nh\u00e2n\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 180 SGK V\u1eadt L\u00fd 12)\u00a0Trong c\u00e1c c\u00e2u sau, c\u00e2u n\u00e0o \u0111\u00fang? 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