sera

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Updated Dec 2025

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slayd 1 sera. allotropiya seri. fizicheskie i ximicheskie svoystva seri. primenenie seri. xalkogeni mesto v ps perechislit otkuda takoe nazvanie stroenie atomov( zarisovat sxemi stroeniya 2-3 el-tov) , sdelat vivod sera stroenie atoma vozmojnie stepeni okisleniya sera v prirode sera samorodnaya sulfidi sulfati v jivix organizmax naxojdenie seri v prirode sera yavlyaetsya na 16-m meste po rasprostranyonnosti v zemnoy kore. vstrechaetsya v svobodnom (samorodnom) sostoyanii i svyazannom vide. v vide sulfatov - soley sernoy kisloti – mirabilit (privesti primeri) v vide sulfidov (privesmti primeri) pirit – «ognenniy kamen» sera vxodit v sostav belkov. osobenno mnogo seri v belkax volos, rogov, shersti. krome etogo sera yavlyaetsya sostavnoy chastyu biologicheski aktivnix veshestv: vitaminov i gormonov. pri nedostatke seri v organizme nablyudaetsya xrupkost i lomkost kostey, vipadenie volos. sera v prirode seroy bogati bobovie rasteniya (gorox, chechevitsa), ovsyanie xlopya, yaytsa fizicheskie svoystva seri tvyordoe kristallicheskoe veshestvo jeltogo tsveta, bez zapaxa ploxo provodit teplotu …

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olonki) sera-vosstanovitel (sm sled slaydi) sera-okislitel ximicheskie svoystva seri (vosstanovitelnie) sera proyavlyaet v reaktsiyax s silnimi okislitelyami: s - 2ē  s+2; s - 4ē  s+4; s - 6ē  s+6 1) c kislorodom: s + o2 t s+4o2 2s + 3o2 t;rt 2s+6o3 2) s galogenami (krome yoda) s + cl2  s+2cl2 3) s kislotami - okislitelyami: s + 2h2so4(konts)  3s+4o2 + 2h2o s + 6hno3(konts)  h2s+6o4 + 6no2 + 2h2o ximicheskie svoystva seri (okislitelnie) s0 + 2ē  s-2 4) sera reagiruet so shelochnimi metallami bez nagrevaniya: 2na + s  na2s c ostalnimi metallami (krome au, pt) - pri povishennoy t: 2al + 3s –t al2s3 cu + s –t cus 5) s nekotorimi nemetallami sera obrazuet binarnie soedineniya: h2 + s  h2s 2p + 3s  p2s3 c + 2s  cs2 sera samorodnaya sulfidi sulfati primenenie seri meditsina proizvodstvo sernoy …

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slayd 1 sera. allotropiya seri. fizicheskie i ximicheskie svoystva seri. primenenie seri. xalkogeni mesto v ps perechislit otkuda takoe nazvanie stroenie atomov( zarisovat sxemi stroeniya 2-3 el-tov) , sdelat vivod sera stroenie atoma vozmojnie stepeni okisleniya sera v prirode sera samorodnaya sulfidi sulfati v jivix organizmax naxojdenie seri v prirode sera yavlyaetsya na 16-m meste po rasprostranyonnosti v zemnoy kore. vstrechaetsya v svobodnom (samorodnom) sostoyanii i svyazannom vide. v vide sulfatov - soley sernoy kisloti – mirabilit (privesti primeri) v vide sulfidov (privesmti primeri) pirit – «ognenniy kamen» sera vxodit v sostav belkov. osobenno mnogo seri v belkax volos, rogov, shersti. krome etogo sera yavlyaetsya sostavnoy chastyu biologicheski aktivnix veshestv: vitaminov i g...

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