Video: Vim li cas ho tsis muaj 2 daim ntawv cog lus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
ob N = O ob daim ntawv cog lus thiab tsis muaj hluav taws xob tsis sib xws, yog li kev tawm tsam ntawm ob thaj tsam ntawm electron ceev yog txo los ntawm 180 ° daim ntawv cog lus lub kaum sab xis, thiab nws yog linear, zoo li nrog CO2. ib tug ntau dua repulsion tshaj ib tug electron nyob rau hauv TSIS MUAJ 2 , yog li lub kaum sab xis O-N-O txo ntxiv, mus rau 115.4 °.
Tsuas yog li ntawd, nitrogen puas tuaj yeem muaj 2 ob daim ntawv cog lus?
Chemistry ntawm nitrogen yog dominated los ntawm qhov yooj yim nrog uas nitrogen atom daim ntawv ob npaug thiab triple daim ntawv cog lus . Ib qho nruab nrab nitrogen atom muaj tsib valence electrons: 2s 2 2 ib p3. A nitrogen atom ua tau Yog li ntawd ua tiav ib qho octet ntawm valence electrons los ntawm kev sib koom peb khub ntawm electrons nrog lwm tus nitrogen atom. ob daim ntawv cog lus.
Tsis tas li ntawd, tsis muaj 2 qhov kev sib koom tes? NO2 tuaj ntawm HNO2 uas yog los ntawm O muaj ib-v fee. tab sis nyob rau hauv no molecule tsis muaj O nrog kev sib cog lus.
Ib yam li ntawd, tej zaum koj yuav nug, daim ntawv cog lus yog dab tsi rau no2?
Hauv nitrite ion, TSIS MUAJ 2 -, muaj ob qhov sib npaug resonance qauv. Txhua N-O daim ntawv cog lus hauv TSIS MUAJ 2 - yog 1.5. Ib yam li hauv nitrate ion, NO3-, muaj peb qhov sib npaug resonance qauv. yog, 1.5 thiab 1.
Puas yog no2 linear lossis khoov?
TSIS MUAJ 2 yog a khoov molecule; Txawm li cas los xij, thaum koj tshem tawm ib qho hluav taws xob los ntawm nws, ua rau nws NO2 +, lub molecule yuav ua kab tawm vim poob ntawm ib leeg electron. Ntawm qhov tod tes, nitrogen dioxide, TSIS MUAJ 2 , yog hom AX2E, thiab nws muaj lub kaum sab xis ntawm 134 degrees. Qhov ntxiv ib khub ntawm SF2 molecule ua rau lub kaum sab xis me dua.
Pom zoo:
Puas yog NaCl muaj daim ntawv cog lus uas tsis muaj polar?
Yog lawm, NaCl yog ib daim ntawv cog lus ionic uas ua rau nws polar. Qhov txawv ntawm electronegativities yog dab tsi ua rau daim ntawv cog lus polar lossis nonpolar. Yog hais tias ob lub atoms nyob rau hauv ib daim ntawv cog lus muaj tib lub electronegativity, (xws li, uas muaj ob ntawm tib lub atoms) daim ntawv cog lus yog nonpolar vim tias ob lub atoms muaj qhov sib npaug ntawm cov electrons
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
Yuav ua li cas koj txiav txim siab yog tias daim ntawv cog lus yog polar tsis muaj lub rooj electronegativity?
Kauj Ruam 2: Txheeb xyuas txhua daim ntawv cog lus raws li polar lossis nonpolar. (Yog hais tias qhov sib txawv ntawm electronegativity rau cov atoms nyob rau hauv ib daim ntawv cog lus yog ntau tshaj 0.4, peb xav txog daim ntawv cog lus polar. Yog hais tias qhov sib txawv ntawm electronegativity tsawg dua 0.4, daim ntawv cog lus yog qhov tseem ceeb nonpolar.) Yog tias tsis muaj polar bonds, lub molecule yog tsis muaj polar