Kim lo\u1ea1i l\u00e0 m\u1ed9t gia \u0111\u00ecnh l\u1edbn. Trong thi\u00ean nhi\u00ean c\u00f3 \u0111\u1ebfn 86 nguy\u00ean t\u1ed1 kim lo\u1ea1i. Th\u00f4ng th\u01b0\u1eddng ng\u01b0\u1eddi ta chia kim lo\u1ea1i th\u00e0nh hai lo\u1ea1i l\u1edbn: Kim lo\u1ea1i \u0111en v\u00e0 kim lo\u1ea1i m\u00e0u. Thu\u1eadt ng\u1eef kim lo\u1ea1i \u0111en l\u00e0m nhi\u1ec1u ng\u01b0\u1eddi l\u1ea7m t\u01b0\u1edfng r\u1eb1ng kim lo\u1ea1i \u0111en \u1eaft ph\u1ea3i c\u00f3 m\u00e0u \u0111en. Th\u1ef1c s\u1ef1 kh\u00f4ng ph\u1ea3i nh\u01b0 v\u1eady.<\/p>\n\n\n\n
Trong s\u1ed1 86 nguy\u00ean t\u1ed1 kim lo\u1ea1i c\u00f3 3 kim lo\u1ea1i \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 kim lo\u1ea1i \u0111en g\u1ed3m: s\u1eaft, mangan, crom\u2026 Ba kim lo\u1ea1i n\u00e0y kh\u00f4ng h\u1ec1 c\u00f3 m\u00e0u \u0111en. S\u1eaft tinh khi\u1ebft c\u00f3 m\u00e0u tr\u1eafng b\u1ea1c, mangan c\u00f3 m\u00e0u tr\u1eafng b\u1ea1c, c\u00f2n crom c\u00f3 m\u00e0u tr\u1eafng x\u00e1m.<\/p>\n\n\n\n
T\u00ean g\u1ecdi kim lo\u1ea1i \u0111en do s\u1eaft d\u1ec5 b\u1ecb oxy ho\u00e1 bi\u1ebfn th\u00e0nh oxit s\u1eaft t\u1eeb Fe3O4 ho\u1eb7c oxit s\u1eaft ba c\u00f3 m\u00e0u n\u00e2u, tr\u00f4ng nh\u01b0 c\u00f3 m\u00e0u \u0111en. Ng\u01b0\u1eddi ta th\u01b0\u1eddng n\u00f3i “c\u00f4ng nghi\u1ec7p luy\u1ec7n kim \u0111en” ch\u1ee7 y\u1ebfu n\u00f3i v\u1ec1 c\u00f4ng nghi\u1ec7p gang th\u00e9p. Ng\u01b0\u1eddi ta th\u01b0\u1eddng th\u1ea5y trong h\u1ee3p kim, th\u00e9p th\u01b0\u1eddng c\u00f3 hai kim lo\u1ea1i mangan v\u00e0 crom n\u00ean ng\u01b0\u1eddi ta g\u1ed9p chung mangan, crom l\u00e0 thu\u1ed9c nh\u00f3m kim lo\u1ea1i \u0111en.<\/p>\n\n\n\n
Tr\u1eeb s\u1eaft, mangan, crom, c\u00e1c kim lo\u1ea1i kh\u00e1c \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 kim lo\u1ea1i m\u00e0u.<\/p>\n\n\n\n
Trong c\u00e1c kim lo\u1ea1i m\u00e0u l\u1ea1i c\u00f3 c\u00e1ch ph\u00e2n lo\u1ea1i theo kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang (t\u1ec9 tr\u1ecdng). V\u00ed d\u1ee5 theo kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang, ng\u01b0\u1eddi ta x\u1ebfp c\u00e1c kim lo\u1ea1i c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang nh\u1ecf h\u01a1n 5 l\u00e0 nh\u00f4m, magie, liti, natri, kali l\u00e0 “kim lo\u1ea1i nh\u1eb9”, c\u00f2n c\u00e1c kim lo\u1ea1i \u0111\u1ed3ng, k\u1ebdm, niken, th\u1ee7y ng\u00e2n, thi\u1ebfc, ch\u00ec\u2026. c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang l\u1edbn h\u01a1n 5 n\u00ean \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c kim lo\u1ea1i n\u1eb7ng. C\u00e1c kim lo\u1ea1i nh\u01b0 v\u00e0ng, b\u1ea1c, b\u1ea1ch kim, osmi, iri\u0111i\u2026 thu\u1ed9c lo\u1ea1i “kim lo\u1ea1i qu\u00fd”. C\u00e1c kim lo\u1ea1i ra\u0111i, urani, thori, poloni c\u00f3 t\u00ednh ph\u00f3ng x\u1ea1 n\u00ean \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 “kim lo\u1ea1i ph\u00f3ng x\u1ea1”. C\u00e1c kim lo\u1ea1i niobi, tantan, ziriconi, v\u00e0ng, lutexi, ra\u0111i, crom, urani\u2026 v\u00ec c\u00f3 h\u00e0m l\u01b0\u1ee3ng th\u1ea5p trong v\u1ecf Tr\u00e1i \u0110\u1ea5t n\u00ean \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 “kim lo\u1ea1i hi\u1ebfm”.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Kim lo\u1ea1i \u0111en; Kim lo\u1ea1i m\u00e0u.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Kim lo\u1ea1i l\u00e0 m\u1ed9t gia \u0111\u00ecnh l\u1edbn. Trong thi\u00ean nhi\u00ean c\u00f3 \u0111\u1ebfn 86 nguy\u00ean t\u1ed1 kim lo\u1ea1i. Th\u00f4ng th\u01b0\u1eddng ng\u01b0\u1eddi ta chia kim lo\u1ea1i th\u00e0nh hai lo\u1ea1i l\u1edbn: Kim lo\u1ea1i \u0111en v\u00e0 kim lo\u1ea1i m\u00e0u. Thu\u1eadt ng\u1eef kim lo\u1ea1i \u0111en l\u00e0m nhi\u1ec1u ng\u01b0\u1eddi l\u1ea7m t\u01b0\u1edfng r\u1eb1ng kim lo\u1ea1i \u0111en \u1eaft ph\u1ea3i c\u00f3 m\u00e0u \u0111en. Th\u1ef1c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[8,15],"tags":[],"class_list":["post-7928","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7928","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=7928"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7928\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}