Cov txheej txheem:
- Yttrium pom nyob qhov twg?
- Thaum twg thiab qhov twg pom ytterbium?
- Leej twg hu ua ytterbium?
- Leej twg pom ytterbium?
Video: Thaum twg thiab qhov twg pom yttrium?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Background. Yttria (Y), lub ntiaj teb uas muaj yttrium tau pom nyob rau hauv 1794los ntawm Gadolin. Nws tau pom nyob rau hauv ib lub chaw txua txiag zeb nyob ntawm Ytterby hauv Sweden. Qhov chaw no tau txais ntau yam khoom txawv txawv uas muaj cov av tsis tshua muaj thiab lwm yam.
Yttrium pom nyob qhov twg?
Txawm hais tias yttrium tau pom nyob rau hauv Scandinavia, nws muaj ntau dua nyob rau lwm lub tebchaws. Tuam Tshoj, Russia, Is Nrias teb, Malaysia thiab Australia yog cov thawj coj ntawm yttrium.
Thaum twg thiab qhov twg pom ytterbium?
Discovery of Ytterbium
Ytterbium tau tshawb pom los ntawm Jean Charles Galissard de Marignac hauv 1878, hauv Geneva, Switzerland. Nws rhaub erbium nitrate kom txog thaum nws decomposed thiab ces muab rho tawm cov residue, uas muaj ib tug tsis paub hais tias dawb hmoov uas nws hu ua ytterbium oxide (ytterbia).
Leej twg hu ua ytterbium?
In 1878 Jean Charles Galissard de Marignac, tus kws tshuaj Swiss, pom tias erbia yog nws tus kheej muaj ob yam. Ib qho kev tivthaiv tau hu ua ytterbia los ntawm Marignac thaum lwm cov khoom khaws cia lub npe erbia. Marignac ntseeg tias ytterbia yog ib qho chaw ntawm lub caij tshiab, uas nws hu ua ytterbium.
Leej twg pom ytterbium?
Fab Kis kws tshuaj Georges Urbain thiab Austrian chemist Carl Auer von Welsbach nws tus kheej tau pom nyob rau xyoo 1907–08 tias Marignac lub ntiaj teb yog tsim los ntawm ob lub oxides, uas Urbain hu ua neoytterbia thiab lutetia. Cov ntsiab lus tam sim no hu ua ytterbium thiab lutetium.
Pom zoo:
Vim li cas yttrium hu ua yttrium?
Yttrium muaj npe after Ytterby, Sweden . Puas muaj pes tsawg neutrons hauv yttrium? Y muaj tus lej ze ze rau 90 thiab muaj 50 neutrons hauv nws cov nucleus . Yttrium puas lom rau tib neeg? Dej soluble compounds ntawm yttrium yog xav tias muaj mob me me, thaum nws cov tshuaj insoluble tsis muaj tshuaj lom.
Qhov twg yog qhov mob thiab qhov twg yog qhov ceeb?
Panic (lub suab los ntawm Matt Frewer) yog lub ntsej muag ntsuab-xiav nrog lub cev ntev. Thaum nws yog me ntsis cunning dua Pain, nws paranoia txhais tau hais tias nws yog heev ceev faj thiab ntau cynical nyob rau hauv lub sij hawm, yog li nws tej zaum yuav ntse dua ib tug ntawm ob.
Thaum twg thiab qhov twg tau pom protactinium?
Protactinium: keeb kwm Protactinium tau tshawb pom los ntawm Otto Hahn, Lise Meitner, Frederick Soddy, John Cranston hauv 1913 ntawm Lub Tebchaws Yelemees, England . Leej twg nrhiav tau protactinium 231? Protactinium lub neej tau lees paub hauv xyoo 1918 thaum lwm qhov isotope, protactinium-231, tau tshawb pom ntawm nws tus kheej thiab kawm los ntawm ob pawg kws tshawb fawb, Otto Hahn thiab Lise Meitner ntawm lub teb chaws Yelemees thiab Frederick Soddy thiab John Cr
Dab tsi yog qhov txawv ntawm kev pom tsis pom thiab pom tsis pom ntau dua?
Kev muaj peev xwm tawm tsam yam tsis muaj qhov kawg ntawm kev sau ntawv vs kev tuaj yeem cuam tshuam rau lwm tus neeg kuj yog qhov sib txawv. Qhov tseem ceeb Invisibility yog "qhov tseeb nrhiav / nkaum / mus ncig tsis pom" qhov twg Qhov Kev Pom Zoo Tshaj Plaws yog ntau ntawm kev sib ntaus sib tua Puas pom qhov tsis pom kev ua haujlwm ntawm kev pom tsis pom ntau dua?
Lub tswv yim twg yog qhov pom ntawm lub tswv yim ntawm qhov zoo thiab qhov phem?
Kev coj ncaj ncees tuav tias qhov zoo thiab qhov phem yog cov ntsiab lus ruaj khov tsim los ntawm tus vajtswv lossis tus vajtswv, xwm txheej, kev coj ncaj ncees, kev paub zoo, lossis lwm yam. Amoralism hais tias qhov zoo thiab qhov phem tsis muaj qab hau, tias tsis muaj kev coj ncaj ncees hauv qhov xwm txheej .
