Video: Dab tsi yog cov cai rau covalent bonding?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub Octet Txoj cai Yuav kom tag nrho cov atoms nyob rau hauv ib lub molecule kom muaj 8 valence electrons - los ntawm kev sib koom, poob los yog tau txais electrons - kom ruaj khov. Rau Covalent bonds , atoms nyiam qhia lawv cov electrons rau ib leeg kom txaus siab rau Octet Txoj cai . Nws xav ua zoo li Argon uas muaj lub plhaub valence tag nrho.
Ib yam li ntawd, tib neeg nug, txoj cai octet yog dab tsi thiab nws siv li cas hauv covalent bonding?
- Octet txoj cai hais tias atoms poob, nce, lossis faib cov electrons kom ua tiav qhov kev teeb tsa ruaj khov ntawm 8 valence electrons ( octet ua ). Nws yog siv nyob rau hauv covalent bonding thaum lub atom qhia electrons kom tiav octet ua.
Tsis tas li ntawd, 3 hom kev cog lus covalent yog dab tsi? Cov peb hom raws li tau hais nyob rau hauv lwm cov lus teb yog polar covalent , tsis muaj polar covalent , thiab kev sib koom tes covalent . Thawj, polar covalent , yog tsim los ntawm ob lub nonmetals uas muaj qhov sib txawv hauv electronegativity. Lawv qhia lawv cov electron ceev tsis sib xws.
Ib yam li ntawd, nws raug nug, kev sib koom ua ke thiab piv txwv yog dab tsi?
Piv txwv ntawm cov tebchaw uas tsuas muaj covalent bonds yog methane (CH4), carbon monoxide (CO), thiab iodine monobromide (IBr). Covalent bonding nruab nrab ntawm hydrogen atoms: Txij li txhua lub atom hydrogen muaj ib lub tshuab hluav taws xob, lawv muaj peev xwm sau lawv cov plhaub sab nraud los ntawm kev sib koom ib khub ntawm electrons los ntawm ib qho covalent bond.
Yuav ua li cas koj txheeb xyuas daim ntawv cog lus covalent?
Muaj ob peb txoj kev sib txawv txiav txim yog a daim ntawv cog lus yog ionic covalent . Los ntawm kev txhais, ib qho ionic daim ntawv cog lus yog nruab nrab ntawm ib tug hlau thiab nonmetal, thiab a covalent bond yog nruab nrab ntawm 2 nonmetals. Yog li koj feem ntau tsuas yog saib ntawm lub rooj zaum thiab txiav txim seb koj cov khoom puas yog ua los ntawm cov hlau / nonmetal lossis tsuas yog 2 nonmetals.
Pom zoo:
Cov kev cai ntawm covalent bonding yog dab tsi?
Hauv covalent daim ntawv cog lus, cov electrons ntawm ob lub atoms sib koom thiab muaj nyob hauv qhov chaw nruab nrab ntawm ob lub nuclei. Cov hluav taws xob tsis zoo raug cuam tshuam rau ob lub nuclei, sib npaug lossis sib npaug. Kev sib faib tsis sib npaug ntawm cov hluav taws xob ntawm cov atoms hu ua polar covalent bond
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Kev sib koom tes
Dab tsi yog qhov tseem ceeb tshaj plaws uas yuav tsum muaj rau cov kua dej ntws hauv cov kav dej Dab tsi lwm yam cuam tshuam rau cov dej ntws?
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