Txhua cov pa roj carbon atom yog sib koom ua ke rau hauv nws cov txheej txheem nrog peb daim ntawv cog lus muaj zog. Qhov no tawm hauv txhua lub atom nrog ib qho khoom siv hluav taws xob, uas ua ke tsim ib qho delocalised 'hiav txwv' ntawm electrons loosely bonding cov txheej ua ke. Cov no delocalised electrons tuaj yeem txav mus los ua ke- ua graphite ib qho hluav taws xob zoo.
Vim li cas graphite yog ib qho hluav taws xob zoo?
Nyob rau hauv ib lub graphite molecule, ib valence electron ntawm txhua cov pa roj carbon atom tseem dawb, Yog li ua graphite ib tug zoo conductor ntawm hluav taws xob. Whereas hauv pob zeb diamond, lawv tsis muaj hluav taws xob mobile dawb. Li no yuav tsis muaj ntws ntawm electrons Yog vim li cas tom qab pob zeb diamond yog tsis zoo conductor hluav taws xob.
Koj yuav ua li cas ua pov thawj tias graphite yog ib qho hluav taws xob zoo?
Kev piav qhia: Graphite tsuas yog ib qho tsis yog hlau uas siv los ua hluav taws xob thiab yog li hu ua tus neeg xyuas pib zoo ntawm hluav taws xob. Pov thawj: Siv tam sim no rau ntawm ib kawg ntawm tus cwj mem lub hau thiab kos nrog lub ntsuas ntsuas ntawm lwm qhov kawg, yog tias lub teeb ntsuas lub teeb cices graphite yog tus neeg xyuas hluav taws xob zoo.
Puas yog kua graphite yog ib tug zoo conductor ntawm hluav taws xob?
Graphite yog insoluble hauv dej. Nws muaj lub siab melting point thiab yogtus neeg xyuas pib zoo ntawm hluav taws xob, uas ua rau nws tsim nyog rau cov khoom siv hluav taws xob uas xav tau hauv electrolysis. Txhua carbon atom yog sib koom ua ke rau hauv nws txheej nrog pebmuaj zog covalent bonds.
Dab tsi yog graphite yog qhov zoo ntawm hluav taws xob?
Graphite yog ib qho 'allotropic daim ntawv' ntawm carbon. Nyob rau hauv ib lub graphite molecule, ib valence electron ntawm txhua carbon atom tseem dawb. Vim tias cov hluav taws xob dawb hauv nws lub moj khaum, graphite tuaj yeem ua hluav taws xob. Yog li ntawd, graphite tau hais tias yog ib tug zoo conductor ntawm hluav taws xob.
