Video: Dab tsi yog qhov tshwj xeeb ntawm technetium?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Technetium yog lub lightest radioactive caij nyob rau hauv lub sij hawm thiab nws cov isotopes lwj mus rau ntau yam ntawm lwm yam xws li ruaj khov ruthenium. Qhov txiaj ntsig loj ntawm technetium -99m (ib nrab-lub neej rau teev) yog tias nws yog tsim los ntawm kev lwj los ntawm lub neej ntev dua isotope molybdenum-99 (ib nrab-lub neej 67 teev).
Tsis tas li ntawd, koj tuaj yeem qhia dab tsi txog cov khoom ntawm technetium?
Cov cuab yeej ntawm technetium Technetium yog silvery-grey hloov hlau. Nws tarnishes maj mam nyob rau hauv cov huab cua noo. Nws dissolves nyob rau hauv nitric acid, aqua regia (nitro-hydrochloric acid) thiab concentrated sulfuric acid, tab sis tsis soluble nyob rau hauv tej lub zog ntawm hydrochloric acid. Technetium cov Feem ntau oxidation xeev yog +7, +5, thiab +4.
Kuj Paub, technetium zoo li cas? Technetium yog ib tug silvery-grey hlau uas tarnishes maj mam nyob rau hauv cov huab cua noo. Cov feem ntau oxidation xeev ntawm technetium yog +7, +5, +4. Nyob rau hauv cov xwm txheej oxidizing technetium (VII) yuav muaj raws li pertechnetate ion, TcO4-. Chemistry ntawm technetium yog hais rau yuav zoo ib yam li uas rhenium.
Ntawm no, yog technetium ntuj lossis hluavtaws?
Nws yog lub teeb tshaj plaws uas nws cov isotopes yog tag nrho cov xov tooj cua; tsis muaj qhov ruaj khov dua li lub xeev ionized tag nrho 97Tc. Yuav luag tag nrho technetium yog tsim los ua ib hluavtaws lub caij, thiab tsuas yog kwv yees li 18,000 tons tau kwv yees tias muaj nyob rau txhua lub sijhawm hauv lub ntiaj teb pob zeb.
Leej twg pom technetium?
Carlo Perrier Emilio Segrè
Pom zoo:
Lub luag haujlwm ntawm CDK yog dab tsi hauv lub cev ua haujlwm ntawm tes tshwj xeeb hauv lub voj voog ntawm tes?
Los ntawm phosphorylation, Cdks teeb liab lub xov tooj ntawm tes uas nws tau npaj kom dhau mus rau theem tom ntej ntawm lub voj voog ntawm tes. Raws li lawv lub npe qhia, Cyclin-Dependent Protein Kinases yog nyob ntawm cyclins, lwm chav kawm ntawm kev tswj hwm cov protein. Cyclins khi rau Cdks, ua kom cov Cdks rau phosphorylate lwm cov molecules
Dab tsi yog qhov tshwj xeeb ntawm cov av?
2.65-2.85 Nws
Dab tsi yog qhov txawv ntawm qhov sib txawv ntawm qhov sib txawv thiab qhov sib txawv ntawm qhov ntab?
Integers thiab floats yog ob yam sib txawv ntawm cov ntaub ntawv tus lej. Ib tus lej (feem ntau hu ua anint) yog tus lej tsis muaj tus lej lej. Float isa floating-point number, uas txhais tau hais tias nws yog tus lej uas muaj tus lej lej. Floats siv thaum xav tau ntau dua
Dab tsi yog qhov chaw tshwj xeeb ntawm cov noob ntawm chromosome?
Nyob rau hauv cov noob caj noob ces, ib locus (plural loci) yog ib qho tshwj xeeb, qhov chaw ruaj khov ntawm chromosome qhov twg ib qho gene lossis cov cim caj ces nyob
Peb lub neej yog dab tsi thiab lawv cov yam ntxwv tshwj xeeb yog dab tsi?
Peb lub npe suav nrog: Archaea - cov npe qub tshaj plaws, cov kab mob qub. Cov kab mob - tag nrho lwm cov kab mob uas tsis suav nrog hauv Archaea domain. Eukarya - tag nrho cov kab mob uas muaj eukaryotic los yog muaj cov kab mob sib txuas thiab cov nuclei