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
Platin l\u00e0 m\u1ed9t kim lo\u1ea1i, nh\u01b0ng, l\u00e0 m\u1ed9t kim lo\u1ea1i k\u1ef3 di\u1ec7u. N\u00f3 c\u00f3 m\u00e0u tr\u1eafng h\u01a1i x\u00e1m. T\u00ean c\u1ee7a n\u00f3 – platin – c\u00f3 g\u1ed1c T\u00e2y Ban Nha l\u00e0 \u201cplata\u201d c\u00f3 ngh\u0129a l\u00e0 \u201cb\u1ea1c nh\u1ecf hay \u00e1 b\u1ea1c\u201d. Platin c\u1ee9ng h\u01a1n \u0111\u1ed3ng nh\u01b0ng l\u1ea1i \u201cd\u1ebbo\u201d nh\u01b0 v\u00e0ng. Ch\u1ec9 c\u1ea7n m\u1ed9t l\u01b0\u1ee3ng b\u1eb1ng m\u1ed9t ounce (0,28gr) platin, ta c\u00f3 th\u1ec3 k\u00e9o th\u00e0nh m\u1ed9t s\u1ee3i d\u00e2y c\u00f3 chi\u1ec1u d\u00e0i b\u1eb1ng chi\u1ec1u d\u00e0i t\u1eeb th\u00e0nh ph\u1ed1 New York (B\u1eafc Hoa K\u1ef3) \u0111\u1ebfn th\u00e0nh ph\u1ed1 New Orleans (Nam Hoa K\u1ef3). M\u1ed9t kh\u1ed1i platin m\u1ed7i b\u1ec1 m\u1ed9t foot (0,3408m) m\u00e0 n\u1eb7ng t\u1edbi h\u01a1n 500kg. Platin n\u1eb7ng g\u1ea5p hai l\u1ea7n ch\u00ec.<\/p>\n\n\n\n
Platin th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y \u1edf qu\u1eb7ng m\u1ecf c\u00f3 l\u1eabn l\u1ed9n nhi\u1ec1u kim lo\u1ea1i hi\u1ebfm nh\u01b0 palladium, rhodium, irdium, os- mium. C\u0169ng c\u00f3 khi platin tr\u1ed9n l\u1eabn v\u1edbi c\u00e1c kim lo\u1ea1i th\u01b0\u1eddng nh\u01b0 \u0111\u1ed3ng, s\u1eaft, chr\u00f4m, k\u1ec1n, v\u00e0ng, b\u1ea1c. Ng\u01b0\u1eddi ta t\u00ecm \u0111\u01b0\u1ee3c platin d\u01b0\u1edbi d\u1ea1ng h\u1ea1t, d\u1ea1ng v\u1ea3y v\u00e0 d\u1ea1ng t\u1ea3ng. Nh\u1eefng m\u1ecf platin l\u1edbn \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n \u0111\u1ea7u ti\u00ean v\u00e0o th\u1ebf k\u1ef7 XVIII t\u1ea1i Nam M\u1ef9. Trong r\u1ea5t nhi\u1ec1u n\u0103m, th\u1ee9 kim lo\u1ea1i n\u00e0y coi nh\u01b0 v\u00f4 d\u1ee5ng, b\u1edfi v\u1eady gi\u00e1 r\u1ea5t r\u1ebb. Th\u1ebf r\u1ed3i, khi \u0111\u00e3 t\u00ecm ra c\u00f4ng d\u1ee5ng c\u1ee7a n\u00f3, ph\u1ea7n v\u00ec n\u00f3 c\u0169ng thu\u1ed9c lo\u1ea1i qu\u00fd hi\u1ebfm, cho n\u00ean platin l\u1ea1i l\u00ean gi\u00e1 v\u00f9 v\u00f9 v\u00e0 l\u00ean t\u1edbi 2,5 tri\u1ec7u \u0111\u00f4 la\/m3. C\u00e1i khi\u1ebfn cho platin \u0111\u01b0\u1ee3c tr\u1ecdng d\u1ee5ng l\u00e0 do n\u00f3 kh\u00f4ng b\u1ecb r\u1ec9 s\u00e9t, \u0111\u1ed9 ch\u1ecbu nhi\u1ec7t cao v\u00e0 kh\u00e1ng acid. \u0111i\u1ec3m n\u00f3ng ch\u1ea3y c\u1ee7a platin l\u00e0 v\u00e0o kho\u1ea3ng 1.8000C. V\u00ec nhi\u1ec1u m\u1ee5c \u0111\u00edch, platin \u0111\u01b0\u1ee3c pha tr\u1ed9n v\u1edbi m\u1ed9t kim lo\u1ea1i kh\u00e1c \u0111\u1ec3 th\u00e0nh h\u1ee3p kim c\u1ee7a platin ch\u1eb3ng h\u1ea1n pha v\u1edbi b\u1ea1c, v\u00e0ng, \u0111\u1ed3ng, k\u1ec1n, thi\u1ebfc. C\u00f4ng d\u1ee5ng ch\u1ee7 y\u1ebfu c\u1ee7a platin l\u00e0 l\u00e0m \u0111\u1ed3 n\u1eef trang, l\u00e0m \u0111i\u1ec3m n\u1ed1i d\u00f2ng \u0111i\u1ec7n \u1edf nh\u1eefng ch\u1ed7 c\u1ea7n \u0111\u00f3ng, m\u1edf li\u00ean t\u1ee5c, l\u00e0m c\u00e2n trong ph\u00f2ng th\u00ed nghi\u1ec7m, l\u00e0m nhi\u1ec1u d\u1ee5ng c\u1ee5 \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c d\u00f9ng trong kh\u00ed t\u01b0\u1ee3ng quan tr\u1eafc ho\u1eb7c c\u1ea7u ch\u00ec trong c\u00e1c d\u1ee5ng c\u1ee5 \u0111i\u1ec7n c\u1ea7n \u0111\u1ed9 nh\u1ea1y cao.<\/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 Platin l\u00e0 m\u1ed9t kim lo\u1ea1i, nh\u01b0ng, l\u00e0 m\u1ed9t kim lo\u1ea1i k\u1ef3 di\u1ec7u. N\u00f3 c\u00f3 m\u00e0u tr\u1eafng h\u01a1i x\u00e1m. T\u00ean c\u1ee7a n\u00f3 – platin – c\u00f3 g\u1ed1c T\u00e2y Ban Nha l\u00e0 \u201cplata\u201d c\u00f3 ngh\u0129a l\u00e0 \u201cb\u1ea1c nh\u1ecf hay \u00e1 b\u1ea1c\u201d. […]<\/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-13977","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\/13977","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=13977"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13977\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=13977"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=13977"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=13977"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}