Poloniy (Polonium), Po \u2014 mende- leev davriy sistemasining VI guruhiga mansub kimyoviy element. Tartib raqami 84, at.m. 208,9824. P. radioaktiv ele- mentlar emirilishida oraliq mah-sulot sifatida hosil bo’ladi. Uning massa son- lari 194 dan 218 gacha bo’lgan 25 ta izoto- pi va yadro izomerlari ma’lum. Eng uzok, mavjud bo’luvchi izotopi 209ro(T|\/2=103 y.), sun’iy yo’l b-n olingan. Har bir tabiiy iztopining radioaktiv element- lar qatorida joylanishiga qarab maxsus nomi va belgisi bor, chunonchi: 2|(|ro\u2014 RaF b-n, 2||ro\u2014 ass b-n, 2l2Po-ThC b-n, 2l4Po-RaC b-n, 215ro\u2014asa b-n, 216ro\u2014 ThA b-n va 2l8Po\u2014RaA b-n belgilanadi. P.ning 210ro izotopi (T1\/2=138,4 kun) muhim amaliy ahamiyatga ega. P. (2|0Ro) ilk bor 1898 y.da M. SK- lo-dovskaya-Kyuri va P. Kyuri tomonidan uran rudasida radioaktiv element sifa- tida kashf etilgan va M. Sklo-dovskaya- Kyuri vatani \u2014 Polsha (lot. Polonia) sharafiga P. deb atalgan. P. \u2014 kumush kabi oq va yumshoq metall, fizik xossala- ri jihatidan vismut va qo’rg’oshinni es- latadi. Suyuklanish t-rasi 254\u00b0, qaynash t-rasi 962\u00b0, zichligi 9,4 g\/sm3, atom radi- usi 1,7 A . Er pustila massa jihatidan 2-10 15% ni tashkil qiladi. P. birikmalarda -2, +2, +4, +6 va- lentli. Uning oksidi, xloridlari, sul- Fati va kompleks birikmalari ma’lum. P. uran rudasini qayta ishlashda hosil bo’ladigan murakkab moddalarning eritmalarini elektrkimyoviy usulda kaytarib olinadi. 1 t uran rudasida 0,1 mg chamasida P. bo’ladi. PoS ni vakuumda 273\u00b0 da qizdirish yo’li b-n ham olinadi. P.ning izotopi 2|0Ro o-zarralar manbai sifatida ishlatiladi. 2|0Ro ning beril- liy b-n aralashmasi turli materiallar- ni analiz qilishda neytronlarning man- Bai bo’lib xizmat qiladi.<\/p>\n","protected":false},"excerpt":{"rendered":"
Poloniy (Polonium), Po \u2014 mende- leev davriy sistemasining VI guruhiga mansub kimyoviy element. Tartib raqami 84, at.m. 208,9824. P. radioaktiv ele- mentlar emirilishida oraliq mah-sulot sifatida hosil bo’ladi. Uning massa … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":99837,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[226],"tags":[],"class_list":["post-118810","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-p-harfi","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"ru","enabled_languages":["uz","kr","ru"],"languages":{"uz":{"title":true,"content":true,"excerpt":false},"kr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/posts\/118810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/comments?post=118810"}],"version-history":[{"count":1,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/posts\/118810\/revisions"}],"predecessor-version":[{"id":118854,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/posts\/118810\/revisions\/118854"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/media\/99837"}],"wp:attachment":[{"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/media?parent=118810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/categories?post=118810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/milliycha.uz\/ru\/wp-json\/wp\/v2\/tags?post=118810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}