Video: Cov khoom siv hlau yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov khoom siv hlau yog cov khoom khib nyiab tsim los ntawm cov hlau atoms uas tau tuav ua ke los ntawm nws yog xim hlau daim ntawv cog lus. Cov ntawv cog lus no zoo li cov molecular orbitals loj loj uas hla tag nrho khov kho . Qhov no txhais tau tias cov electrons hauv cov khoom siv hlau yog delocalized. Daim duab zoo ntawm ib qho hlau khov kho yog hais tias ntawm cation nyob rau hauv lub hiav txwv ntawm electrons.
Xav txog qhov no, cov khoom siv hlau yog dab tsi?
Cov khoom siv hlau - Ua nce ntawm cov hlau atoms uas tau tuav ua ke los ntawm nws yog xim hlau daim ntawv cog lus. Tus cwj pwm los ntawm cov ntsiab lus melting siab, tuaj yeem ua los ntawm cov mos mos thiab malleable mus rau qhov nyuaj heev, thiab yog cov khoom siv hluav taws xob zoo.
Ib sab saum toj no, steel puas yog hlau khoom? Qhov zoo them nuclei ntawm hlau atoms tau tuav ua ke los ntawm valence electrons los tsim cov khoom siv hlau . Cov electrons raug suav hais tias "delocalized" vim tias lawv tsis raug khi rau ib qho tshwj xeeb atoms, xws li hauv covalent bonds. Piv txwv li: Yuav luag tag nrho cov hlau thiab lawv cov alloys, xws li kub, tooj dag, hlau.
Raws li txoj cai, cov khoom ntawm cov khoom siv hlau yog dab tsi?
Cov khoom siv hlau muaj qhov txawv txav khoom : Ntxiv nrog rau qhov muaj thermal thiab hluav taws xob conductivity thiab ua tau yooj yim thiab ductile, lawv nthuav tawm luster, ci ntsa iab uas qhia txog lub teeb. Lub alloy yog ib qho sib xyaw ntawm cov hlau uas muaj ntau metallic zog txawv ntawm cov ntawm nws cov ntsiab lus.
Puas yog aluminium yog xim hlau?
Aluminium yog cov hlau vim nws yog tus neeg xyuas pib zoo ntawm tshav kub thiab hluav taws xob, nws yog ib qho nyuaj, ci iab thiab nws yog malleable thiab ductile. Lawv muaj cov ntsiab lus kub kub thiab melting. Lawv muaj nws yog xim hlau lustre. Lawv yog khov kho xeev.
Pom zoo:
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