T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 2 – Arkady Leokum<\/p>\n\n\n\n
Sau v\u00e0ng \u0111\u1ebfn \u0111\u1ed3ng l\u00e0 kim lo\u1ea1i m\u00e0 ng\u01b0\u1eddi ta ph\u00e1t hi\u1ec7n s\u1edbm nh\u1ea5t. th\u1eddi b\u00ecnh minh c\u1ee7a l\u1ecbch s\u1eed l\u00e0 th\u1eddi \u0111\u1ea1i \u0111\u1ed3 \u0111\u1ed3ng. \u0111\u1ed3ng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong tr\u1ea1ng th\u00e1i tinh khi\u1ebft d\u01b0\u1edbi d\u1ea1ng t\u1ea3ng ho\u1eb7c h\u1ea1t. C\u00f3 l\u1ebd nh\u1eefng ng\u01b0\u1eddi \u0111\u1ea7u ti\u00ean \u0111\u00e3 l\u01b0\u1ee3m nh\u1eefng h\u1ea1t \u0111\u1ed3ng v\u00ec nom kh\u00e1 \u0111\u1eb9p. th\u1ebf r\u1ed3i, ng\u01b0\u1eddi ta ph\u00e1t hi\u1ec7n ra nhi\u1ec1u t\u00ednh n\u0103ng c\u1ee7a \u201cvi\u00ean \u0111\u00e1 m\u00e0u \u0111\u1ecf k\u1ef3 l\u1ea1\u201d n\u00e0y, ch\u1eb3ng h\u1ea1n nh\u01b0 n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c r\u00e8n th\u00e0nh nh\u1eefng h\u00ecnh d\u1ea1ng mong mu\u1ed1n. t\u00ednh n\u0103ng n\u00e0y khi\u1ebfn cho vi\u1ec7c ch\u1ebf t\u1ea1o c\u00e1c v\u0169 kh\u00ed v\u00e0 dao tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n \u0111\u1ebdo g\u1ecdt v\u0169 kh\u00ed \u1ea5y t\u1eeb \u0111\u00e1 l\u1eeda.<\/p>\n\n\n\n
V\u1ec1 sau n\u1eefa ng\u01b0\u1eddi ta l\u1ea1i ph\u00e1t hi\u1ec7n ra l\u00e0 c\u00f3 th\u1ec3 n\u1ea5u \u0111\u1ed3ng cho ch\u1ea3y ra \u0111\u1ec3 \u0111\u00fac th\u00e0nh ch\u00e9n, t\u00e1ch u\u1ed1ng n\u01b0\u1edbc. R\u1ed3i \u0111\u1ed3ng \u0111\u01b0\u1ee3c khai th\u00e1c t\u1eeb m\u1ecf \u0111\u1ed3ng \u0111\u1ec3 ch\u1ebf t\u1ea1o th\u00e0nh nhi\u1ec1u c\u00f4ng c\u1ee5 v\u00e0 \u0111\u1ed3 d\u00f9ng. trong h\u00e0ng ng\u00e0n n\u0103m \u0111\u1ed3ng v\u1eabn \u0111\u01b0\u1ee3c coi l\u00e0 kim lo\u1ea1i \u0111\u1ed9c nh\u1ea5t c\u00f3 th\u1ec3 gia c\u00f4ng \u0111\u01b0\u1ee3c, b\u1edfi v\u00ec v\u00e0ng ch\u1eb3ng nh\u1eefng khan hi\u1ebfm m\u00e0 c\u00f2n v\u00ec qu\u00e1 m\u1ec1m trong \u1ee9ng d\u1ee5ng. Nh\u1eefng c\u00f4ng c\u1ee5 b\u1eb1ng \u0111\u1ed3ng c\u00f3 l\u1ebd \u0111\u00e3 \u0111\u01b0\u1ee3c d\u00f9ng trong vi\u1ec7c x\u00e2y d\u1ef1ng kim t\u1ef1 th\u00e1p.<\/p>\n\n\n\n
Khi thau, m\u1ed9t h\u1ee3p ch\u1ea5t \u0111\u1ed3ng v\u00e0 thi\u1ebfc \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n th\u00ec \u0111\u1ed3ng v\u1eabn c\u00f2n \u0111\u01b0\u1ee3c khai th\u00e1c v\u1edbi kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn. Ch\u1ec9 sau khi ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c s\u1eaft th\u00ec \u0111\u1ed3ng m\u1edbi \u00edt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng h\u01a1n. m\u00e3i cho \u0111\u1ebfn th\u1eddi \u0111\u1ea1i \u0111i\u1ec7n kh\u00ed hi\u1ec7n nay th\u00ec \u0111\u1ed3ng tr\u1edf n\u00ean \u0111\u1eafc d\u1ee5ng tr\u1edf l\u1ea1i nh\u1edd kh\u1ea3 n\u0103ng d\u1eabn \u0111i\u1ec7n t\u1ed1t. \u0111\u1ed3ng l\u1ea1i tr\u1edf th\u00e0nh kim lo\u1ea1i quan tr\u1ecdng trong c\u00f4ng nghi\u1ec7p hi\u1ec7n \u0111\u1ea1i.<\/p>\n\n\n\n
\u00cdt c\u00f3 ng\u01b0\u1eddi \u0111\u01b0\u1ee3c nh\u00ecn th\u1ea5y \u0111\u1ed3ng \u1edf d\u1ea1ng nguy\u00ean ch\u1ea5t ho\u1eb7c khi nh\u00ecn th\u1ea5y m\u00e0 nh\u1eadn ra \u0111\u01b0\u1ee3c \u0111\u00f3 l\u00e0 \u0111\u1ed3ng nguy\u00ean ch\u1ea5t. \u0111\u1ed3ng s\u00e1ng \u00e1nh kim, h\u01a1i ng\u1ea3 m\u00e0u \u0111\u1ecf s\u1eadm khi l\u1ed9 ra \u00e1nh s\u00e1ng. \u0111\u1ed3ng m\u00e0 ta nh\u00ecn th\u1ea5y th\u01b0\u1eddng c\u00f3 m\u00e0u n\u00e2u \u0111\u1ecf, kh\u00f4ng b\u00f3ng v\u00e0 c\u00f3 v\u1ebb x\u1ec9n, b\u1ea9n. C\u00e1i m\u00e0u v\u00e0 c\u00e1i v\u1ebb x\u1ec9n, b\u1ea9n n\u00e0y l\u00e0 do kh\u00ed oxy trong kh\u00f4ng kh\u00ed \u0111\u00e3 t\u00e1c \u0111\u1ed9ng v\u00e0o m\u1eb7t ngo\u00e0i c\u1ee7a \u0111\u1ed3ng. t\u1ea1i h\u1ea7u h\u1ebft c\u00e1c n\u01a1i tr\u00ean th\u1ebf gi\u1edbi, \u0111\u1ed3ng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong d\u1ea1ng h\u1ed7n h\u1ee3p v\u1edbi c\u00e1c ch\u1ea5t kh\u00e1c. Do \u0111\u00f3, ph\u1ea3i t\u00e1ch \u0111\u1ed3ng ra kh\u1ecfi c\u00e1c ch\u1ea5t kh\u00e1c th\u00ec m\u1edbi d\u00f9ng \u0111\u01b0\u1ee3c. \u0111\u1ed3ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y l\u1eabn l\u1ed9n v\u1edbi ch\u1ea5t l\u01b0u hu\u1ef3nh m\u00e0 ta th\u01b0\u1eddng g\u1ecdi l\u00e0 \u201cqu\u1eb7ng sulphite\u201d. H\u01a1n th\u1ebf n\u1eefa, qu\u1eb7ng sulphite n\u00e0y c\u00f2n c\u00f3 l\u1eabn c\u00e1c ch\u1ea5t kh\u00e1c nh\u01b0 s\u1eaft, arsenic. \u0111i\u1ec1u n\u00e0y c\u00e0ng khi\u1ebfn cho vi\u1ec7c t\u00e1ch \u0111\u1ed3ng ra th\u00eam kh\u00f3 kh\u0103n.<\/p>\n\n\n\n
So v\u1edbi nhi\u1ec1u kim lo\u1ea1i kh\u00e1c th\u00ec \u0111\u1ed3ng c\u00f3 nhi\u1ec1u t\u00ednh n\u0103ng \u00edch d\u1ee5ng. \u0111\u1ed3ng c\u1ee9ng v\u00e0 b\u1ec1n nh\u01b0ng \u0111\u1ed3ng th\u1eddi c\u0169ng kh\u00e1 m\u1ec1m, d\u1ec5 d\u00e1t m\u1ecfng, k\u00e9o th\u00e0nh s\u1ee3i v\u00e0 d\u1ec5 g\u00f2, u\u1ed1n. \u0111\u1ed3ng d\u1eabn nhi\u1ec7t c\u0169ng nh\u01b0 d\u1eabn \u0111i\u1ec7n r\u1ea5t t\u1ed1t. \u0111\u1ed3ng d\u1ec5 ch\u1ea1m kh\u1eafc nh\u01b0ng l\u1ea1i kh\u00f4ng d\u1ec5 g\u00e3y, b\u1ec3. Pha tr\u1ed9n \u0111\u1ed3ng v\u1edbi c\u00e1c kim lo\u1ea1i kh\u00e1c, ta c\u00f3 nh\u1eefng h\u1ee3p kim. \u0111\u1ed3ng k\u1ebdm (bress) l\u00e0 h\u1ee3p kim g\u1ed3m hai ph\u1ea7n \u0111\u1ed3ng v\u00e0 m\u1ed9t ph\u1ea7n k\u1ebdm. \u0111\u1ed3ng thi\u1ebfc (leronze) l\u00e0 h\u1ee3p kim g\u1ed3m \u0111\u1ed3ng v\u1edbi thi\u1ebfc ho\u1eb7c h\u1ee3p kim kh\u00e1c.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 2 – Arkady Leokum Sau v\u00e0ng \u0111\u1ebfn \u0111\u1ed3ng l\u00e0 kim lo\u1ea1i m\u00e0 ng\u01b0\u1eddi ta ph\u00e1t hi\u1ec7n s\u1edbm nh\u1ea5t. th\u1eddi b\u00ecnh minh c\u1ee7a l\u1ecbch s\u1eed l\u00e0 th\u1eddi \u0111\u1ea1i \u0111\u1ed3 \u0111\u1ed3ng. \u0111\u1ed3ng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong tr\u1ea1ng th\u00e1i tinh khi\u1ebft d\u01b0\u1edbi d\u1ea1ng t\u1ea3ng ho\u1eb7c h\u1ea1t. […]<\/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":[15],"tags":[],"class_list":["post-13750","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13750","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=13750"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13750\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=13750"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=13750"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=13750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}