Txheej txheem cej luam ntawm Chalcogens hauv Biology Chalcogens yog cov tshuaj lom neeg hauv pawg 16ntawm lub sijhawm teem sijhawm. Cov pab pawg no, uas tseem hu ua tsev neeg oxygen, muaj cov ntsiab lus oxygen (O), sulfur (S), selenium (Se), tellurium (Te), thiab cov khoom siv hluav taws xob polonium (Po).
YPuas yog selenium A se2?
Ib tug selenide yog ib tug tshuaj compound uas muaj ib tug selenium anion nrog oxidation tooj ntawm −2 (Se2- ), ntau npaum li cov sulfur ua hauv sulfide. Chemistry ntawm selenides thiab sulfides yog zoo sib xws. Zoo ib yam li sulfide, hauv aqueous tov, selenide ion, Se2-, yog nthuav dav tsuas yog hauv cov xwm txheej yooj yim.
Yuav ua li cas yog cov tshuaj formula rau selenide?
Tshwj tsis yog qhov sau tseg, cov ntaub ntawv raug muab rau cov ntaub ntawv hauv lawv lub xeev tus qauv (ntawm 25 ° C [77 ° F], 100 kPa). Sodium selenide yog ib qho inorganic compound ntawm sodium thiab selenium nrog cov tshuaj formula Na2Se.
Ion mg2+ npe yog dab tsi?
Magnesium ion | Mg+2 - PubChem.
YPuas selenium npub lossis ci?
Amorphous selenium yog xim liab, hauv daim ntawv hmoov, lossis dub, hauv vitreous, lossis iav, daim ntawv. Daim ntawv ruaj khov tshaj plaws ntawm lub caij, crystalline hexagonalselenium, yog xim hlau grey, thaum crystalline monoclinic selenium yog xim liab.