Video: Valence bond theory txhais li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Valence daim ntawv cog lus ( VB ) kev xav yog achemical kev sib txuas lus uas piav txog cov tshuaj kev sib raug zoo nruab nrab ntawm ob lub atom. Ob lub atoms sib koom ib leeg lub hnub ci hluav taws xob los tsim ib lub orbital los tsim ib lub hybrid orbitaland daim ntawv cog lus ua ke. Sigma and pi daim ntawv cog lus yog ib feem ntawm valence bond theory.
Ua raws li qhov no, cov ntsiab lus tseem ceeb ntawm valence bond theory yog dab tsi?
Valence bond theory piav qhia txog cov qauv hluav taws xob ntawm cov molecules. Cov kev xav hais tias electrons sau cov atomic orbitals ntawm ib lub atom nyob rau hauv ib lub molecule. Nws kuj tseem hais tias lub nucleus ntawm ib lub atom yog attracted rau cov electrons ntawm lwm lub atom.
Tsis tas li ntawd, vim li cas lub tswvyim ntawm hybridization yuav tsum muaj nyob rau hauv valence bond theory? Orbital Hybridization Theory Cov valence bond theory qhov tseem ceeb hais tias tag nrho daim ntawv cog lus yog tsim los ntawm atom pub dawb a valence electron mus rau lwm lub atom kom tiav nws octet. Cov kev xav , ua ke nrog kev paub txog valence electrons, qhia peb pes tsawg daim ntawv cog lus muaj nyob nruab nrab ntawm ob lub atoms hauv amolecule.
Tsis tas li ntawd, daim ntawv cog lus yog dab tsi raws li valence bond theory?
Valence Bond txoj kev xav piav covalentbond tsim raws li cov qauv hluav taws xob ntawm molecules. Cov kev xav xav tias electrons nyob hauv atomicorbitals ntawm tus kheej atoms nyob rau hauv ib lub molecule, thiab cov electrons ntawm ib atom yog attracted rau lub nucleus ntawm lwm atom.
Dab tsi yog qhov tsis xws luag ntawm valence bond theory?
Postulates ntawm Valence Bond Theory Lub xub ntiag ntawm ntau unpaired electrons nyob rau hauv lub valence plhaub ntawm ib qho atom ua rau nws tsim ntau yam daim ntawv cog lus nrog rau lwm cov atoms. Paired electrons tam sim no nyob rau hauv lub valence plhaub tsis koom nrog hauv kev tsim cov tshuaj daim ntawv cog lus as per cov valence bondtheory.
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
Valence txhais li cas?
Valence. [vā'l?ns] Tus lej tag nrho uas sawv cev rau lub peev xwm ntawm ib lub atom lossis ib pab pawg ntawm atoms ua ke nrog lwm cov atoms lossis pawg ntawm atoms. Lub valence yog txiav txim los ntawm cov xov tooj ntawm electrons uas ib tug atom yuav poob, ntxiv, los yog sib koom
Koj txhais li cas los ntawm lo lus txhais?
Lub ntsiab lus txhais yog ib nqe lus ntawm lub ntsiab lus ntawm ib lo lus (ib lo lus, kab lus, lossis lwm yam cim). Cov lus txhais tau muab faib ua ob pawg loj, cov ntsiab lus tsis txaus ntseeg (uas sim muab lub ntsiab lus ntawm lub ntsiab lus) thiab cov ntsiab lus txuas ntxiv (uas sim sau cov khoom uas ib lo lus piav qhia)
Txhais tau li cas los txhais ib daim duab peb sab?
Kev txhais lus. Kev txhais lus yog ib qho kev hloov pauv uas tshwm sim thaum ib daim duab tau txav los ntawm ib qho chaw mus rau lwm qhov chaw yam tsis tau hloov nws qhov loj, duab lossis kev taw qhia. Txhawm rau txhais cov ntsiab lus P (x, y), ib chav nyob sab xis thiab b units, siv P'(x + a, y + b)
Dab tsi txhais tau tias valence electrons?
Kev txhais ntawm valence electron .: ib qho hluav taws xob ib leeg lossis ib qho ntawm ob lossis ntau dua electrons nyob rau hauv lub plhaub sab nraud ntawm lub atom uas yog lub luag haujlwm rau cov khoom siv tshuaj ntawm lub atom