T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 1 – Arkady Leokum<\/p>\n\n\n\n
K\u1ec3 t\u1eeb xa x\u01b0a, ng\u01b0\u1eddi ta \u0111\u00e3 bi\u1ebft khai th\u00e1c m\u1ecf b\u1ea1c. T\u1ea1i ch\u00e2u \u00c2u, \u0111\u00e3 c\u00f3 th\u1eddi s\u1ef1 gi\u00e0u c\u00f3 c\u1ee7a vua ch\u00faa t\u00f9y thu\u1ed9c v\u00e0o s\u1ef1 khai th\u00e1c m\u1ecf b\u1ea1c. Th\u1ef1c ra, t\u1ea1i T\u00e2y Ban Nha, khi c\u00e1c m\u1ecf b\u1ea1c b\u1eaft \u0111\u1ea7u c\u1ea1n, nh\u00e0 vua l\u1ea5y l\u00e0m sung s\u01b0\u1edbng khi nh\u1eadn ra r\u1eb1ng s\u1ef1 ph\u00e1t hi\u1ec7n ra ch\u00e2u M\u1ef9 \u0111\u00e3 gi\u00fap m\u00ecnh \u0111o\u1ea1t \u0111\u01b0\u1ee3c nhi\u1ec1u l\u01b0\u1ee3ng b\u1ea1c l\u1edbn – k\u1ec3 c\u1ea3 m\u1ecf b\u1ea1c – \u1edf Mexico v\u00e0 \u1edf Peru. M\u1ecf Potosi \u1edf Peru h\u00e0ng n\u0103m khai th\u00e1c \u0111\u01b0\u1ee3c m\u1ed9t l\u01b0\u1ee3ng b\u1ea1c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 4 tri\u1ec7u dollar trong su\u1ed1t 250 n\u0103m cho vua T\u00e2y Ban Nha.<\/p>\n\n\n\n
Trong th\u1eddi k\u1ef3 \u201c\u0111\u1ed5 x\u00f4 \u0111i t\u00ecm v\u00e0ng\u201d \u1edf California, ng\u01b0\u1eddi ta qu\u1ea3 quy\u1ebft l\u00e0 \u201c\u0111\u1ea5t \u0111en\u201d c\u00f3 ch\u1ee9a b\u1ee5i v\u00e0ng. Th\u1eadt ra, ch\u1ec9 do t\u00ecnh c\u1edd m\u00e0 ng\u01b0\u1eddi ta ph\u00e1t hi\u1ec7n ra qu\u1eb7ng b\u1ea1c. B\u1ea1c l\u00e0 m\u1ed9t trong nh\u1eefng kim lo\u1ea1i \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed5 r\u1ed9ng r\u00e3i nh\u1ea5t tr\u00ean \u0111\u1ecba c\u1ea7u. \u0111\u00f4i khi ng\u01b0\u1eddi ta t\u00ecm \u0111\u01b0\u1ee3c b\u1ea1c kh\u1ed1i. \u1ede Na Uy, \u0111\u00e3 c\u00f3 l\u1ea7n ng\u01b0\u1eddi ta \u0111\u00e0o \u0111\u01b0\u1ee3c m\u1ed9t kh\u1ed1i b\u1ea1c n\u1eb7ng t\u1edbi 750 kg. Nh\u01b0ng th\u01b0\u1eddng th\u00ec b\u1ea1c xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng qu\u1eb7ng t\u1ea1p, ph\u1ea3i \u0111\u00e3i, l\u1ecdc\u2026<\/p>\n\n\n\n
Trong qu\u1eb7ng, b\u1ea1c th\u01b0\u1eddng k\u1ebft h\u1ee3p \u0111\u01b0\u1ee3c v\u1edbi l\u01b0u hu\u1ef3nh d\u01b0\u1edbi d\u1ea1ng sufat b\u1ea1c, hay d\u01b0\u1edbi d\u1ea1ng c\u00e1c sulfit ch\u1ee7 y\u1ebfu g\u1ed3m \u0111\u1ed3ng, ch\u00ec, th\u1ee7y ng\u00e2n. \u1ede Hoa K\u1ef3, b\u1ea1c \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y l\u1eabn v\u1edbi ch\u00ec. Do \u0111\u00f3 c\u0169ng c\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p v\u00e0 k\u1ef9 thu\u1eadt \u0111\u1ec3 t\u00e1ch b\u1ea1c kh\u1ecfi c\u00e1c h\u1ee3p ch\u1ea5t.<\/p>\n\n\n\n
B\u1ea1c m\u1ec1m n\u00ean \u00edt \u0111\u01b0\u1ee3c d\u00f9ng trong tr\u1ea1ng th\u00e1i nguy\u00ean ch\u1ea5t. N\u00f3 \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p v\u1edbi kim lo\u1ea1i kh\u00e1c. \u0111\u1ed3ng ti\u1ec1n l\u00e0m b\u1eb1ng b\u1ea1c ch\u1eb3ng h\u1ea1n ch\u1ec9 c\u00f3 90% l\u00e0 b\u1ea1c, 10% c\u00f2n l\u1ea1i l\u00e0 \u0111\u1ed3ng. C\u00e1c \u0111\u1ed3 d\u00f9ng v\u00e0 \u0111\u1ed3 trang s\u1ee9c b\u1eb1ng b\u1ea1c ch\u1ec9 g\u1ed3n 92,5% l\u00e0 b\u1ea1c, c\u00f2n l\u1ea1i l\u00e0 \u0111\u1ed3ng.<\/p>\n\n\n\n
N\u01b0\u1edbc Anh c\u00f3 \u0111\u1ed3ng ti\u1ec1n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ed3ng \u201csterling\u201d. T\u00ean n\u00e0y c\u00f3 ngu\u1ed3n g\u1ed1c kh\u00e1 ng\u1ed9 ngh\u0129nh. T\u00ean \u0111\u00f3 do ngu\u1ed3n g\u1ed1c t\u1eeb ch\u1eef Easterling l\u00e0 t\u00ean c\u1ee7a m\u1ed9t d\u00f2ng h\u1ecd ng\u01b0\u1eddi \u0111\u1ee9c, d\u00f2ng h\u1ecd n\u00e0y c\u00f3 nh\u1eefng th\u01b0\u01a1ng gia r\u1ea5t l\u01b0\u01a1ng thi\u1ec7n, \u0111\u1ebfn n\u1ed7i n\u0103m 1215, h\u1ecd \u0111\u01b0\u1ee3c vua John n\u01b0\u1edbc Anh giao cho nhi\u1ec7m v\u1ee5 \u0111\u00fac ti\u1ec1n cho n\u01b0\u1edbc Anh. H\u1ecd l\u00e0m \u0103n \u0111\u00e0ng ho\u00e0ng \u0111\u1ebfn n\u1ed7i t\u00ean c\u1ee7a h\u1ecd \u0111\u01b0\u1ee3c \u0111\u1ed3ng h\u00f3a v\u1edbi gi\u00e1 tr\u1ecb b\u1ec1n v\u1eefng c\u1ee7a \u0111\u1ed3ng ti\u1ec1n do h\u1ecd \u0111\u00fac. T\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ed3ng \u201csterling\u201d b\u1ea1c \u0111\u1ec1u c\u00f3 in h\u00ecnh n\u1ed5i \u201cchu\u1ea9n b\u1ea1c\u201d c\u00f9ng v\u1edbi ch\u1eef v\u00e0 huy hi\u1ec7u c\u1ee7a t\u1eebng v\u00f9ng.<\/p>\n\n\n\n
B\u1ea1c r\u00f2ng kh\u00f4ng b\u1ecb m\u1edd trong kh\u00f4ng kh\u00ed s\u1ea1ch. N\u1ebfu n\u00f3 h\u00f3a s\u1ea1m \u0111en th\u00ec \u0111\u00f3 l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a ch\u1ea5t sulfur trong kh\u00f4ng kh\u00ed t\u1eeb m\u1ed9t th\u00e0nh ph\u1ed1 \u0111\u1ea7y kh\u00f3i ho\u1eb7c g\u1ea7n c\u00e1c gi\u1ebfng d\u1ea7u. G\u1ea7n gi\u1ed1ng v\u1edbi v\u00e0ng, b\u1ea1c r\u1ea5t d\u1ec5 \u201ctrau\u201d (ch\u1ea1m, kh\u1eafc). Ch\u1ec9 m\u1ed9t ounce (0,28g) ta c\u00f3 th\u1ec3 k\u00e9o th\u00e0nh m\u1ed9t s\u1ee3i d\u00e0i g\u1ea7n 50 km. B\u1ea1c d\u1eabn \u0111i\u1ec7n v\u00e0 nhi\u1ec7t r\u1ea5t t\u1ed1t.<\/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 1 – Arkady Leokum K\u1ec3 t\u1eeb xa x\u01b0a, ng\u01b0\u1eddi ta \u0111\u00e3 bi\u1ebft khai th\u00e1c m\u1ecf b\u1ea1c. T\u1ea1i ch\u00e2u \u00c2u, \u0111\u00e3 c\u00f3 th\u1eddi s\u1ef1 gi\u00e0u c\u00f3 c\u1ee7a vua ch\u00faa t\u00f9y thu\u1ed9c v\u00e0o s\u1ef1 khai th\u00e1c m\u1ecf b\u1ea1c. Th\u1ef1c ra, t\u1ea1i T\u00e2y Ban Nha, khi […]<\/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-13553","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\/13553","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=13553"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13553\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=13553"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=13553"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=13553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}