2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lanthanides thiab actinides yog cov ntsiab lus uas tsis muaj lub orbitals. Lanthanides yog tag nrho cov hlau nrog reactivity zoo ib yam li pab pawg 2 hais. Actinides yog tag nrho cov khoom siv hluav taws xob. … Actinides feem ntau pom muaj nyob rau hauv cov ntawv thov uas lawv cov xov tooj cua tuaj yeem siv los siv lub zog xws li cov tshuab pacemakers.
Tus yam ntxwv ntawm lanthanides thiab actinides yog dab tsi?
Tag nrho cov ntsiab lus lanthanide nthuav tawm lub xeev oxidation +3. Actinides yog cov khoom siv hlau. Tag nrho cov ntawm lawv yog mos, muaj ib tug silvery xim (tab sis tarnish nyob rau hauv cov huab cua), thiab muaj kuj high density thiab plasticity. Ib txhia kuj muab riam txiav.
Lanthanides thiab actinides nyob qhov twg?
Lanthanides thiab actinides nyob feem ntau nyob rau hauv "f-block" ntawm lub sijhawm teem sijhawm. Lanthanides yog siv rau hauv cov khoom xws li hybrid tsheb, superconductors, thiab cov hlau nplaum ruaj khov. Cov actinide americium yog siv rau hauv cov pa luam yeeb.
Vim li cas lanthanides thiab actinides nyob hauv qab ntawm lub rooj zaum?
Cov lanthanides thiab actinides tau sib cais los ntawm tus so ntawm lub sij hawm lub sij hawm, feem ntau tshwm sim raws li cais kab nyob rau hauv qab. Yog vim li cas rau qhov kev tso kawm no muaj ua nrog cov khoom siv hluav taws xob ntawm cov ntsiab lus.
4f ntsiab yog dab tsi?
Lanthanides: Cov ntsiab lus uas lub xeem electron nkag mus rau ib qho ntawm 4f orbitals yog hu ua 4f-block ntsiab lossisthawj inner transition series. Cov no tseem hu ua lanthanides lossis lanthanons, vim lawv tuaj tom qab lanthanum tam sim ntawd.
Pom zoo:
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Muaj pes tsawg actinides?
Muaj 15 actinide ntsiab. Cov kev teeb tsa hluav taws xob ntawm cov actinides siv f sublevel, tshwj tsis yog lawrencium, d-block lub caij. Nyob ntawm koj txhais lus ntawm lub caij nyoog ntawm cov ntsiab lus, cov koob pib nrog actinium lossis thorium, txuas ntxiv mus rau lawrencium.
Dab tsi yog qhov txawv ntawm ib tus neeg rau zaub mov mob siab rau thiab tsis yog neeg rau zaub mov?
Dab tsi yog qhov sib txawv ntawm kev mob siab rau thiab tsis yog cov servers feem ntau? Dedicated server yog qhov kev xyaum ua kom muaj tus IP tshwj xeeb thiab cov neeg rau zaub mov tshwj xeeb tsuas yog ua haujlwm rau koj xwb, thaum nyob hauv tsis yog neeg rau zaub mov ntau lub vev xaib thiab tib neeg tuaj yeem tau txais txiaj ntsig los ntawm tib lub server.
Pob lanthanides ua hluav taws xob?
Cov lanthanides feem ntau yog cov hlau mos nrog lawv cov tawv tawv nce thoob plaws lub sijhawm. Txawm tias lawv yog hlau thiab tuaj yeem ua hluav taws xobcov lanthanides muaj qhov tiv taus siab heev. … Tag nrho cov lanthanides teb nrog cov ntsiab lus los tsim cov tebchaw feem ntau nrog lub xeev +3 oxidation, ruaj khov tshaj plaws rau lanthanides.
Vim li cas lanthanides hu ua inner transition elements?
Cov lanthanides thiab actinides tsim ib pab pawg uas zoo li yuav luag tsis sib txuas los ntawm qhov seem ntawm lub sijhawm. Qhov no yog f block ntawm cov ntsiab lus, hu ua cov kev hloov pauv sab hauv. Qhov no yog vim txoj haujlwm tus lej raug ntawm Pawg 2 thiab 3 ntawm cov hlau hloov pauv.
