Video: Dab tsi yog covalent daim ntawv cog lus rau dummies?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Environmental Science Rau Dummies
Thaum ob lub atom koom ua ke hauv a covalent bond , lawv tsim ib lub molecule uas sib koom electrons. Tsis zoo li hauv ionic daim ntawv cog lus , tsis yog ib qho ntawm cov atoms hauv a covalent bond poob lossis nce ib qho hluav taws xob; Hloov chaw, ob lub atoms siv ib khub ntawm cov electrons sib koom.
Tsis tas li ntawd, covalent daim ntawv cog lus yooj yim yog dab tsi?
Covalent bonds yog tshuaj daim ntawv cog lus nruab nrab ntawm ob lub atoms uas tsis yog hlau. Ib qho piv txwv yog dej, qhov twg hydrogen (H) thiab oxygen (O) daim ntawv cog lus sib koom ua ke (H2O). Lub plhaub sab nrauv feem ntau muaj yim electrons, los yog ob qho ntawm hydrogen lossis helium. Covalent bonds yog tsim los ntawm atoms sib koom valence electrons.
Tom qab ntawd, lo lus nug yog, dab tsi yog daim ntawv cog lus ionic rau dummies? Environmental Science Rau Dummies Txhawm rau tsim cov molecules, atoms yuav tsum pauv lossis faib cov electrons los ntawm lawv lub plhaub sab nraud los tsim cov atomic daim ntawv cog lus . Ib ionic daim ntawv cog lus tshwm sim thaum ib lub atom muab ib qho hluav taws xob rau lwm lub atom. Atoms txuas ua ke hauv txoj kev no hu ua ionic tshuaj sib xyaw.
Tsuas yog li ntawd, koj yuav piav qhia txog daim ntawv cog lus li cas?
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. Cov khub electron no hu ua cov khub sib koom lossis kev sib raug zoo khub, thiab qhov sib npaug ruaj khov ntawm kev txaus siab thiab kev tsis txaus siab ntawm cov atoms, thaum lawv sib koom electrons, yog hu ua covalent bonding.
Covalent daim ntawv cog lus yog dab tsi thiab muab 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.
Pom zoo:
Dab tsi yog daim ntawv cog lus kaum rau saws?
Lub seesaw zoo maximizes cov ces kaum ntawm daim ntawv cog lus ntawm ib leeg ib khub thiab lwm yam atoms nyob rau hauv lub molecule. Cov khub ib leeg yog nyob rau hauv ib txoj hauj lwm equatorial muab 120 thiab 90 degree daim ntawv cog lus cov ces kaum, piv rau tsuas yog 90 degree daim ntawv cog lus ces kaum yog muab tso rau ntawm txoj hauj lwm axial
Yuav ua li cas yog daim ntawv cog lus sib txawv ntawm daim ntawv cog lus ionic?
Qhov sib txawv ntawm cov ionic thiab covalent daim ntawv cog lus yog tias covalent daim ntawv cog lus yog tsim thaum ob lub atoms sib koom electrons. Ionic bonds yog lub zog uas tuav ua ke electrostatic zog ntawm kev nyiam ntawm cov ions oppositely them. Ionic bonds muaj qhov sib txawv electronegativity ntau dua lossis sib npaug li 2
Dab tsi yog qhov txawv ntawm daim ntawv cog lus lub zog thiab daim ntawv cog lus dissociation zog?
Qhov sib txawv tseem ceeb ntawm kev sib txuas ntawm lub zog thiab lub zog bonddissociation yog tias lub zog sib txuas yog qhov nruab nrab ntawm lub zog xav tau los rhuav tshem tag nrho cov kev sib txuas ntawm tib ob hom atoms nyob rau hauv ib qho chaw sib txuas whereas daim ntawv cog lus dissociation zog yog tus nqi ntawm cov hluav taws xob xav tau los rhuav tshem ib qho kev sib koom ua ke inhomolysis
Puas yog daim ntawv cog lus hydrogen zoo ib yam li daim ntawv cog lus?
Hydrogen daim ntawv cog lus yog lub npe muab rau electrostatic kev sib cuam tshuam ntawm tus nqi zoo ntawm hydrogen atom thiab tus nqi tsis zoo ntawm oxygen atom ntawm ib qho chaw nyob sib ze. Covalent daim ntawv cog lus yog qhov sib cuam tshuam electrostatic ntawm ob lub atom hauv tib lub molecule
Dab tsi covalent daim ntawv cog lus muaj 2 sib koom electrons?
Covalent bonds tuaj yeem yog ib qho, ob npaug, thiab triple daim ntawv cog lus. Ib daim ntawv cog lus tshwm sim thaum ob lub tshuab hluav taws xob sib koom thiab yog tsim los ntawm ib daim ntawv cog lus ntawm ob lub atom. Ob daim ntawv cog lus tshwm sim thaum plaub lub tshuab hluav taws xob sib koom ntawm ob lub atom thiab muaj ib daim ntawv cog lus sigma thiab ib daim ntawv cog lus pi