Video: Vim li cas cov alloys nyuaj dua li cov hlau ntshiab BBC Bitesize?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nyob rau hauv ib tug alloy, nyob ntawd yog cov atom ntawm qhov sib txawv. Qhov me me los yog loj dua atoms yuam kev cov txheej ntawm atoms hauv cov hlau ntshiab. Qhov no txhais tau hais tias yuav tsum muaj zog ntau dua rau cov khaubncaws sab nraud povtseg dhau ib leeg. Cov alloy yog nyuaj dua thiab muaj zog dua tshaj tus ntshiab hlau.
Raws li, yog vim li cas alloys nyuaj dua cov hlau ntshiab GCSE?
Cov hlau nplaum muaj cov atom ntawm qhov sib txawv. Qhov no ua rau nws nyuaj rau cov khaubncaws sab nraud povtseg, yog li ntawd alloys yog nyuaj dua tus hlau ntshiab . Nws yog qhov nyuaj dua rau cov khaubncaws sab nraud povtseg ntawm cov atom kom swb rau ib leeg alloys . Tooj, kub thiab txhuas yog mos heev rau ntau siv.
Tsis tas li ntawd, qhov txawv ntawm cov hlau ntshiab thiab cov hlau alloy yog dab tsi? Los ntawm txhais, cov hlau ntshiab muaj ib lub ntsiab. Cov hlau nplaum muaj ob lossis ntau lub ntsiab lus lossis alloys melted thiab blended ua ke, yog li lawv cov tshuaj formulas muaj ntau tshaj ib lub caij. Piv txwv li, lub ntshiab hlau hlau tsuas muaj hlau atoms.
Tsis tas li ntawd, vim li cas alloys nyuaj dua li cov hlau ntshiab?
A hlau ntshiab muaj zoo tib yam atoms teem nyob rau hauv tsis tu ncua txheej. Cov khaubncaws sab nraud povtseg ntawm ib leeg yooj yim. Cov hlau nplaum yog nyuaj dua thiab muaj zog dua vim qhov sib txawv ntawm cov atoms sib xyaw hlau ua rau cov atomic txheej tsis tu ncua, yog li lawv tsis tuaj yeem swb yooj yim.
Vim li cas cov hlau ntshiab yog mos thiab malleable?
Hlau tau piav raws li tuaj yeem (tuaj yeem raug ntaus rau hauv nplooj ntawv) thiab ductile (tuaj yeem rub tawm mus rau hauv cov xov hlau). Qhov no yog vim muaj peev xwm ntawm cov atoms los dov ib leeg rau hauv txoj haujlwm tshiab yam tsis tau rhuav tshem cov hlau nplaum.
Pom zoo:
Vim li cas nws nyuaj rau txheeb xyuas cov hlau ions los ntawm Xim ntawm nplaim taws?
Lub zog no raug tso tawm raws li lub teeb, nrog cov yam ntxwv nplaim xim ntawm cov hlau ions sib txawv vim qhov sib txawv ntawm cov hluav taws xob hloov pauv. Raws li tau hais, cov kev sim no ua haujlwm zoo dua rau qee cov hlau ions dua li lwm yam; tshwj xeeb, cov ions pom nyob rau hauv kab hauv qab ntawm cov infographic feem ntau yog faus thiab nyuaj rau qhov txawv
Vim li cas cov hlau ntshiab tuaj yeem ua tau yooj yim?
Lawv yog cov malleable, uas txhais tau tias lawv tuaj yeem khoov thiab zoo li yooj yim. Hauv cov hlau ntshiab, cov atoms tau teeb tsa hauv cov txheej txheem kom huv si, thiab thaum lub zog siv rau cov hlau (xws li raug ntaus nrog rauj), cov khaubncaws sab nraud povtseg ntawm cov hlau atoms tuaj yeem xaub rau ib leeg, muab cov hlau tshiab
Vim li cas cov khoom ntshiab muaj qhov melting ntau dua?
Lub luag hauj lwm ntawm cov rog intermolecular Cov rog no yuav tsum raug cuam tshuam thaum cov khoom siv yaj, uas yuav tsum muaj lub zog nkag. Lub tswv yim ntawm lub zog txhais mus rau qhov kub siab. Yog li, qhov muaj zog zog uas tuav ua ke ib qho khoom, qhov siab dua nws qhov melting point
Cov yam ntxwv twg ntawm cov hlau atoms pab piav qhia vim li cas valence electrons hauv cov hlau yog delocalized?
Ib daim ntawv cog lus hlau yog kev sib koom ntawm ntau cov khoom siv hluav taws xob sib cais ntawm ntau cov ions zoo, qhov twg cov electrons ua raws li 'cov kua nplaum' muab cov khoom tsim nyog. Nws tsis zoo li covalent lossis ionic bonding. Cov hlau muaj zog ionization tsawg. Yog li ntawd, valence electrons tuaj yeem raug delocalized thoob plaws hauv cov hlau
Vim li cas cov ntsiab lus thiab cov ntsiab lus yog cov tshuaj ntshiab?
Elements thiab compounds yog ob qho tib si piv txwv ntawm cov khoom ntshiab. Ib yam khoom uas tuaj yeem tawg mus rau hauv cov tshuaj lom neeg yooj yim dua (vim tias nws muaj ntau dua ib qho) yog ib qho khoom sib xyaw. Piv txwv li, dej yog acompound tsim los ntawm cov ntsiab lus hydrogen thiaboxygen