Video: Cov hlau hloov pauv puas muaj cov ntsiab lus melting tsawg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov yaj - cov ntsiab lus ntawm kev hloov hlau yog siab vim 3d electrons muaj rau metallic bonding. Qhov ntom ntawm cov kev hloov hlau muaj siab rau tib yam li lub siab kub cov ntsiab lus . Hloov cov hlau tag nrho cov tuab hlau nrog siab yaj thiab boil cov ntsiab lus.
Ntawm no, qhov kev hloov pauv hlau twg muaj qhov qis tshaj melting point?
Zinc
Tom qab ntawd, lo lus nug yog, vim li cas cov hlau hloov pauv muaj cov ntsiab lus melting siab dua li Pawg 1 hlau? Qhov qis qis pab 1 , qhov ntau reactive lub caij thiab qis dua nws yaj thiab boil taw tes . Pawg 1 hlau tsim cov roj hydrogen thaum reacting nrog dej (zoo nkauj heev). Piv txwv li, Hloov pauv hlau muaj cov ntsiab lus melting ntau dua thiab ntau tsawg reactive li ntawd ua tsis ncav cuag nrog dej los yog oxygen.
Ib tug kuj yuav nug, Puas yog Pawg 1 cov hlau muaj cov ntsiab lus melting tsawg?
Alkali hlau muaj qis melting thiab boil Cov ntsiab lus Tag nrho Pawg 1 cov ntsiab lus muaj ib qho electron nyob rau hauv lawv lub plhaub sab nraud uas yog tuav tsis muaj zog los ntawm cov nucleus. Qhov nce atomic radius txhais tau tias tsis muaj zog ntawm cov atoms thiab yog li a qis melting thiab boil taw tes.
Dab tsi yog qhov sib txawv hauv cov ntsiab lus melting ntawm cov hlau hloov pauv hauv cov koob?
Hauv kev hloov pauv lub ntsiab lus series , tus naj npawb ntawm "unpaired" electrons thawj zaug nce ntawm 1 (Sc) mus rau qhov siab tshaj plaws ntawm 5 (Cr) thiab tom qab ntawd txo qis rov qab mus rau 0. Yog li ntawd, lub yaj thiab cov ntsiab lus kub thawj zaug nce thiab tom qab ntawd txo qis qhia maxima mus rau nruab nrab ntawm qhov series.
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