Video: Puas muaj leej twg muaj 4 daim ntawv cog lus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Sulfur muaj plaub electrons nyob ib ncig ntawm nws nyob rau hauv cov qauv no (ib tug ntawm txhua ntawm nws plaub daim ntawv cog lus ) uas yog ob lub electrons tsawg dua tus naj npawb ntawm valence electrons nws xav tau muaj ib txwm, thiab xws li nws nqa tus nqi ntawm +2.
Ib yam li ntawd, muaj pes tsawg daim ntawv cog lus tuaj yeem muaj sulfur?
ob daim ntawv cog lus
Tsis tas li, muaj pes tsawg daim ntawv cog lus tuaj yeem tsim cov sulfur nrog hydrogen? Ob hydrogen (H) atoms tau daim ntawv cog lus nrog ib sulfur (S) atom, ua tus qauv H2S, tseem hu ua hydrogen sulfide.
Qhov thib ob, leej faj puas tuaj yeem muaj ntau dua 4 daim ntawv cog lus?
Qhov no txhais tau tias tuaj yeem muaj ntau dua 8 valenceelectrons (los yog ntau tshaj 4 daim ntawv cog lus vim cwb daim ntawv cog lus muaj 2 electrons). Peb pom qhov no tshwm sim hauv cov molecules qhov twg lub hauv paus atom yuav muaj ntau tshaj 4 daim ntawv cog lus nyob rau hauv thiaj li yuav muaj ib tug formalcharge (los yog feem ntau ruaj khov configuration) ntawm 0.
Puas muaj leej faj ua covalent bonds?
Txawm li cas los xij, ib qho atom ntawm oxygen feem ntau daim ntawv tsuas yog ob covalent bonds , zoo li hauv molecular oxygen, O2: Feem ntau vim nws qhov chaw sab nraud loj dua li ntawm cov pa oxygen, sulfur tuaj yeem tsim tsawg li ob covalent bonds , zoo li hauv hydrogen sulfide (H2S), los yog ntau npaum li rau, xws li hauv sulfur trioxide (SO3los yog sulfuric acid (H2YOG4):
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
Leej twg yog tus qauv ntawm ib qho tsis muaj polar molecule uas muaj cov ntawv cog lus nonpolar?
(1), (3) H2O thiab NH3 yog cov molecules uas muaj polar covalent bonds, tab sis lawv cov khoom siv hluav taws xob tsis sib luag. (4) H2 yog ib tug nonpolar molecule uas muaj ib tug symmetrical tis ntawm electrons, tab sis cov nyiaj ntawm cov hydrogen atoms yog nonpolar covalent
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