\u0110\u00e1 qu\u00fd c\u00f3 nhi\u1ec1u m\u00e0u s\u1eafc l\u1ea5p l\u00e1nh g\u1ee3i s\u1ef1 ham th\u00edch c\u1ee7a m\u1ecdi ng\u01b0\u1eddi. V\u1ebb \u0111\u1eb9p k\u1ef3 l\u1ea1 c\u1ee7a \u0111\u00e1 qu\u00fd do \u0111\u00e2u m\u00e0 c\u00f3? Qua c\u00e1c ph\u00e2n t\u00edch ho\u00e1 h\u1ecdc v\u00e0 ph\u00e2n t\u00edch quang ph\u1ed5, ng\u01b0\u1eddi ta m\u1edbi bi\u1ebft m\u1ed9t s\u1ed1 kim lo\u1ea1i \u0111\u00e3 t\u00f4 \u0111i\u1ec3m cho \u0111\u00e1 qu\u00fd s\u1eafc th\u00e1i nh\u01b0 v\u1eady. Trong \u0111\u00e1 qu\u00fd c\u00f3 th\u1ec3 ch\u1ee9a kim lo\u1ea1i nhi\u1ec1u ho\u1eb7c \u00edt, c\u00f3 lo\u1ea1i ch\u1ee9a nhi\u1ec1u kim lo\u1ea1i n\u00ean ch\u00fang c\u00f3 nhi\u1ec1u m\u00e0u s\u1eafc kh\u00e1c nhau. V\u00ed d\u1ee5 c\u00e1c \u0111\u00e1 qu\u00fd m\u00e0u \u0111\u1ecf ho\u1eb7c xanh \u0111en th\u01b0\u1eddng c\u00f3 ch\u1ee9a kim lo\u1ea1i crom. Lo\u1ea1i ng\u1ecdc Th\u1ed5 Nh\u0129 K\u1ef3 (hay c\u00f2n g\u1ecdi l\u00e0 l\u1ee5c t\u00f9ng th\u1ea1ch) c\u00f3 m\u00e0u xanh bi\u1ebfc l\u00e0 do c\u00f3 ch\u1ee9a \u0111\u1ed3ng. Trong lo\u1ea1i m\u00e3 n\u00e3o m\u00e0u \u0111\u1ecf chu sa c\u00f3 ch\u1ee9a s\u1eaft. C\u00e1c kim lo\u1ea1i c\u00f3 trong c\u00e1c \u0111\u00e1 qu\u00fd h\u1ea5p th\u1ee5 m\u1ed9t ph\u1ea7n \u00e1nh s\u00e1ng M\u1eb7t Tr\u1eddi v\u00e0 cho ph\u1ea3n x\u1ea1 c\u00e1c tia s\u00e1ng c\u00f2n l\u1ea1i, c\u00e1c tia ph\u1ea3n x\u1ea1 n\u00e0y s\u1ebd cho m\u00e0u c\u1ee7a \u0111\u00e1 qu\u00fd.<\/p>\n\n\n\n
C\u00f3 m\u1ed9t s\u1ed1 lo\u1ea1i \u0111\u00e1 qu\u00fd m\u00e0u s\u1eafc c\u1ee7a ch\u00fang c\u00f3 li\u00ean quan \u0111\u1ebfn s\u1ef1 s\u1eafp x\u1ebfp c\u00e1c nguy\u00ean t\u1eed trong tinh th\u1ec3 \u0111\u00e1 qu\u00fd. M\u00e0u xanh \u00e1nh v\u00e0ng c\u1ee7a ng\u1ecdc lam, m\u00e0u v\u00e0ng l\u1ee5c c\u1ee7a lo\u1ea1i ng\u1ecdc xanh bi\u1ebfc l\u00e0 do quy lu\u1eadt ph\u00e2n b\u1ed1 c\u1ee7a c\u00e1c nguy\u00ean t\u1eed trong n\u1ed9i b\u1ed9 tinh th\u1ec3 quy\u1ebft \u0111\u1ecbnh.<\/p>\n\n\n\n
M\u00e0u s\u1eafc c\u1ee7a \u0111\u00e1 qu\u00fd c\u00f3 th\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c do s\u1ef1 nhu\u1ed9m m\u00e0u nh\u00e2n t\u1ea1o. C\u00f3 kh\u00e1 nhi\u1ec1u c\u00e1ch nhu\u1ed9m m\u00e0u \u0111\u00e1. Ng\u01b0\u1eddi c\u1ed5 Hy L\u1ea1p, c\u1ed5 La M\u00e3 \u0111\u00e3 d\u00f9ng c\u00e1ch x\u1eed l\u00fd sau \u0111\u00e2y \u0111\u1ec3 nhu\u1ed9m m\u00e0u m\u00e3 n\u00e3o. Tr\u01b0\u1edbc h\u1ebft ng\u01b0\u1eddi ta ng\u00e2m m\u00e3 n\u00e3o v\u00e0o m\u1eadt ong \u0111un n\u00f3ng m\u1ea5y tu\u1ea7n l\u1ec5. Sau \u0111\u00f3 l\u1ea5y ra r\u1eeda s\u1ea1ch b\u1eb1ng n\u01b0\u1edbc r\u1ed3i cho v\u00e0o axit sunfuric v\u00e0 \u0111un s\u00f4i m\u1ea5y gi\u1edd li\u1ec1n. K\u1ebft qu\u1ea3 ng\u01b0\u1eddi ta s\u1ebd thu \u0111\u01b0\u1ee3c lo\u1ea1i m\u00e3 n\u00e3o c\u00f3 v\u1eb1n \u0111\u1ecf ho\u1eb7c \u0111en. Ng\u01b0\u1eddi d\u00e2n v\u00f9ng Ural c\u00f2n c\u00f3 ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd k\u1ef3 di\u1ec7u h\u01a1n. H\u1ecd \u0111em th\u1ea1ch anh \u00e1m kh\u00f3i kh\u1ea3m v\u00e0o b\u00e1nh m\u00ec r\u1ed3i \u0111em \u0111\u1ed1t tr\u00ean l\u1eeda, h\u1ecd s\u1ebd \u0111\u01b0\u1ee3c m\u1ed9t lo\u1ea1i th\u1ea1ch anh \u00e1m kh\u00f3i \u00e1nh v\u00e0ng hi\u1ebfm th\u1ea5y.<\/p>\n\n\n\n
Ng\u00e0y nay nh\u1edd s\u1ef1 ti\u1ebfn b\u1ed9 c\u1ee7a khoa h\u1ecdc k\u1ef9 thu\u1eadt ng\u01b0\u1eddi ta \u0111\u00e3 d\u00f9ng c\u00e1c tia ph\u00f3ng x\u1ea1, tia t\u1eed ngo\u1ea1i \u0111\u1ec3 x\u1eed l\u00fd v\u00e0 nhu\u1ed9m m\u00e0u \u0111\u00e1 qu\u00fd. Ng\u1ecdc lam khi \u0111em chi\u1ebfu tia ph\u00f3ng x\u1ea1 s\u1ebd bi\u1ebfn th\u00e0nh m\u00e0u v\u00e0ng. Th\u1ea1ch anh ph\u1ea5n h\u1ed3ng khi x\u1eed l\u00fd v\u1edbi tia t\u1eed ngo\u1ea1i s\u1ebd c\u00f3 m\u00e0u n\u00e2u.<\/p>\n\n\n\n
Tuy nhi\u00ean b\u00ed m\u1eadt v\u1ec1 m\u00e0u s\u1eafc \u0111\u00e1 qu\u00fd v\u1eabn ch\u01b0a \u0111\u01b0\u1ee3c kh\u00e1m ph\u00e1 ho\u00e0n to\u00e0n. Th\u1ebf nh\u01b0ng ng\u01b0\u1eddi ta \u0111\u00e3 l\u1ee3i d\u1ee5ng c\u00e1c tri th\u1ee9c b\u01b0\u1edbc \u0111\u1ea7u v\u1ec1 \u0111\u00e1 qu\u00fd \u0111\u1ec3 ch\u1ebf t\u1ea1o \u0111\u01b0\u1ee3c c\u00e1c lo\u1ea1i \u0111\u00e1 qu\u00fd nh\u00e2n t\u1ea1o kh\u00f4ng k\u00e9m g\u00ec \u0111\u00e1 qu\u00fd t\u1ef1 nhi\u00ean. C\u00e1c lo\u1ea1i \u0111\u00e1 qu\u00fd kh\u00f4ng ch\u1ec9 d\u00f9ng \u0111\u1ec3 ch\u1ebf t\u00e1c \u0111\u1ed3 trang s\u1ee9c m\u00e0 c\u00f2n \u0111\u1ec3 ch\u1ebf t\u1ea1o \u1ed5 tr\u1ee5c cho c\u00e1c lo\u1ea1i \u0111\u1ed3ng h\u1ed3. Tr\u00ean c\u00e1c \u1ed1ng phun kh\u00ed c\u1ee7a c\u00e1c \u0111\u1ed9ng c\u01a1 c\u1ea7n \u0111\u1ebfn m\u1ea5y tr\u0103m \u1ed5 tr\u1ee5c b\u1eb1ng ng\u1ecdc \u0111\u1ecf. C\u00e1c “ch\u00e2n k\u00ednh” tr\u00ean \u0111\u1ed3ng h\u1ed3 \u0111eo tay c\u0169ng \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng ng\u1ecdc \u0111\u1ecf.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: \u0110\u00e1 qu\u00fd; Kim lo\u1ea1i.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
\u0110\u00e1 qu\u00fd c\u00f3 nhi\u1ec1u m\u00e0u s\u1eafc l\u1ea5p l\u00e1nh g\u1ee3i s\u1ef1 ham th\u00edch c\u1ee7a m\u1ecdi ng\u01b0\u1eddi. V\u1ebb \u0111\u1eb9p k\u1ef3 l\u1ea1 c\u1ee7a \u0111\u00e1 qu\u00fd do \u0111\u00e2u m\u00e0 c\u00f3? Qua c\u00e1c ph\u00e2n t\u00edch ho\u00e1 h\u1ecdc v\u00e0 ph\u00e2n t\u00edch quang ph\u1ed5, ng\u01b0\u1eddi ta m\u1edbi bi\u1ebft m\u1ed9t s\u1ed1 kim lo\u1ea1i \u0111\u00e3 t\u00f4 \u0111i\u1ec3m cho \u0111\u00e1 qu\u00fd s\u1eafc th\u00e1i nh\u01b0 v\u1eady. […]<\/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-7755","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\/7755","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=7755"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7755\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7755"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7755"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}