Cov txheej txheem:
Video: Kev siv hlau yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hlau : Hlau yog siv los ua hlau cov tsev. Hlau yog siv los ua tsheb, tshuab, kav, ntim, ntsia thawv, thiab lwm yam. Kub thiab nyiaj yog siv los ua jewellery. Tooj liab yog siv los ua cov khoom siv hluav taws xob, khoom siv ua noj, thiab lwm yam.
Hauv qhov no, kev siv cov hlau tseem ceeb yog dab tsi?
Siv rau Hlau thiab Nonmetals Piv txwv li: ci hlau xws li tooj liab, nyiaj, thiab kub feem ntau yog siv rau kev kos duab, hniav nyiaj hniav kub, thiab npib. Muaj zog hlau xws li hlau thiab hlau alloys xws li stainless hlau yog siv los tsim cov qauv, nkoj, thiab tsheb nrog rau tsheb, tsheb ciav hlau, thiab tsheb thauj khoom.
Qhov thib ob, vim li cas cov hlau tseem ceeb hauv peb lub neej txhua hnub? Hlau siv tau ntau thiab qhov no yog vim li cas lawv natural khoom ntawm rigidity, ductility, tensile zog, thiab lwm yam. Lawv muaj siab atomic luj thiab cov zauv nyob rau hauv lub periodic rooj. Lawv oxides yog alkaline nyob rau hauv cov xwm, yog li lawv muaj peev xwm tiv taus acids. Hlau muaj zog heev, ruaj thiab tiv taus zoo heev rau ntuj hnav thiab tsim kua muag.
Tom qab, lo lus nug yog, dab tsi yog 5 siv cov hlau?
10 kev siv hlau hauv lub neej txhua hnub
- Kub, Platinum thiab nyiaj yog siv los ua jewelleries thiab ornaments.
- Hlau thiab hlau yog siv rau kev tsim kho lub hom phiaj.
- Aluminium, steel yog siv los ua khoom siv.
- Mercury yog siv rau hauv tus pas ntsuas kub thiab pab xyuas qhov kub thiab txias.
- Aluminium yog siv los ua rwb thaiv tsev hlau.
Dab tsi yog qhov tseem ceeb ntawm cov hlau?
Nrog rau qhov no, hlau feem ntau yog ductile, malleable, ci, thiab tuaj yeem tsim cov alloys nrog lwm yam hlau . Qee yam hlau yog hlau ( tseem ceeb rau steel), aluminium, thiab tooj liab. Hlau muaj ntau heev tseem ceeb mus rau lub zej zog siab zog: lawv thauj cov hluav taws xob hauv hluav taws xob hluav taws xob, thiab muab ntau yam kev pabcuam.
Pom zoo:
Dab tsi yog peb cov hlau zoo siv hauv kev kho hniav?
Peb cov hlau noble siv hauv kev kho hniav yog kub, platinum, thiab palladium
Dab tsi yog cov hlau nplaum uas ua los ntawm qhov kev npaj ntawm electrons yog dab tsi?
Electrons yog teem rau hauv plhaub thiab orbitals nyob rau hauv ib tug atom. Yog hais tias lawv sau lub orbitals kom muaj ntau spin taw tes rau hauv qab (los yog vice versa), txhua atom yuav ua zoo li ib tug me me hlau nplaum. Thaum ib daim ntawm cov hlau tsis muaj hlau nplaum (lossis lwm yam khoom siv ferromagnetic) raug rau sab nraud magnetic teb, ob yam tshwm sim
Dab tsi yog kev siv cov saw hlau nuclear siv rau?
Nuclear chain reaction. Nuclear chain reactions yog cov tshuaj tiv thaiv uas tau txais lub zog nuclear, feem ntau los ntawm nuclear fission. Cov kev cuam tshuam ntawm cov saw hlau no yog qhov muab cov chaw tsim hluav taws xob nuclear nrog lub zog uas tom qab ntawd hloov mus ua hluav taws xob siv los ntawm tib neeg
Dab tsi yog qhov teeb meem loj tshaj plaws ntawm kev siv cov kev tshawb fawb txog kev sib raug zoo?
Tej yam tsis zoo los yog kev tshawb fawb txog kev sib raug zoo muaj xws li: a. Lawv tsis tuaj yeem siv los tsim kom muaj kev sib raug zoo-thiab-tshuaj los yog kev coj ntawm kev cuam tshuam
Dab tsi ntoo yog siv rau kev tsheb ciav hlau?
Txoj kev tsheb ciav hlau feem ntau yog cov ntoo tawv - feem ntau yog ntoo qhib, tab sis kuv tau hnov txog cov cedar siv thaum nws muaj, lossis hauv thaj chaw uas muaj dej nyab lossis dej nyab. Ntawm cov kab sib dua, cov ntoo pheej yig dua li ntoo thuv tau siv rau ntawm cov ntu ncaj, thiab cov ntoo tawv tau siv rau ntawm cov nkhaus thiab cov keyboards