Video: Covalent bonding txhais li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A covalent bond , kuj hu ua molecular daim ntawv cog lus , yog tshuaj daim ntawv cog lus uas koom nrog kev sib koom ntawm electron khub ntawm atoms. Rau ntau lub molecules, kev sib koom ntawm cov hluav taws xob tso cai rau txhua lub atom kom ncav cuag qhov sib npaug ntawm lub plhaub sab nraud, sib xws rau cov khoom siv hluav taws xob ruaj khov.
Ua raws li qhov no hauv kev txiav txim siab, dab tsi yog kev sib koom ua ke thiab cov piv txwv?
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.
Ib tug kuj yuav nug, dab tsi ua rau muaj kev sib cog lus? Covalent bonding tshwm sim thaum khub ntawm electrons sib koom los ntawm atoms. Atoms yuav covalently daim ntawv cog lus nrog rau lwm cov atoms nyob rau hauv thiaj li yuav tau txais ntau stability, uas yog tau los ntawm kev tsim ib tug tag nrho electron plhaub. Los ntawm kev sib koom lawv sab nrauv feem ntau (valence) electrons, atoms tuaj yeem sau lawv lub plhaub hluav taws xob sab nraud thiab tau txais kev ruaj ntseg.
Ib yam li ib tug yuav nug, 3 hom kev sib cog lus 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 qho piv txwv ntawm covalent compound yog dab tsi?
Yog koj tshuaj xyuas lo lus, covalent , nws txhais tau tias nrog valence electrons. Cov no tshuaj sib xyaw yog tsim thaum ob lub hlau tsis sib xyaw ua ke. Qee yam piv txwv yog dej, H2O, carbon dioxide, CO2 ', thiab hydrogen gas uas yog diatomic, H2.
Pom zoo:
Koj txhais qhov hnyav txhais li cas?
Cov ntsiab lus. Weighted Mean: Ib qho txhais tau tias qee qhov txiaj ntsig pab ntau dua li lwm tus. Thaum qhov hnyav ntxiv rau 1: tsuas yog muab txhua qhov hnyav los ntawm tus nqi sib xws thiab suav tag nrho. Txwv tsis pub, muab txhua qhov hnyav w los ntawm nws qhov sib piv tus nqi x, suav tias tag nrho, thiab faib los ntawm qhov sib npaug ntawm qhov hnyav: Qhov Ntsuas Ntsuas = ΣwxΣw
Dab tsi yog cov cai rau covalent bonding?
Txoj Cai Octet xav kom tag nrho cov atoms hauv ib lub molecule kom muaj 8 valence electrons - los ntawm kev sib koom, poob lossis tau txais electrons - kom ruaj khov. Rau Covalent daim ntawv cog lus, atoms nyiam qhia lawv cov electrons rau ib leeg kom ua raws li Txoj Cai Octet. Nws xav ua zoo li Argon uas muaj lub plhaub valence tag nrho
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
Covalent thiab ionic txhais li cas?
Ib daim ntawv cog lus ionic yog tsim los ntawm cov hlau thiab tsis yog hlau. Covalent bonding yog ib hom tshuaj sib txuas ntawm ob lub atoms uas tsis yog xim hlau uas yog tus cwj pwm los ntawm kev sib koom ua ke ntawm cov khoom siv hluav taws xob ntawm cov atoms thiab lwm cov ntawv cog lus
Equipotential bonding txhais li cas?
Equipotential bonding yog qhov tseem ceeb ntawm kev sib txuas hluav taws xob tswj xyuas ntau yam khoom siv hluav taws xob thiab cov khoom siv hluav taws xob ntxiv ntawm qhov muaj peev xwm zoo ib yam. Yog li ntawd, nws yog ib qho tsim nyog kom tag nrho cov khoom no raug khi rau lub ntiaj teb kev pabcuam hluav taws xob ntawm lub tsev kom muaj kev nyab xeeb ntawm cov neeg nyob