Lub electronegativity ntawm h2o yog dab tsi?
Lub electronegativity ntawm h2o yog dab tsi?

Video: Lub electronegativity ntawm h2o yog dab tsi?

Video: Lub electronegativity ntawm h2o yog dab tsi?
Video: FORM 4: CHAPTER 5: CHEMICAL BOND (5.7: PROPERTIES OF IONIC COMPOUNDS AND COVALENT COMPOUNDS) 2024, Kaum ib hlis
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Dej, Polar Bond

Hydrogen muaj electronegativity ntawm 2.0, thaum oxygen muaj electronegativity ntawm 3.5. Qhov sib txawv ntawm electronegativities yog 1.5, uas txhais tau hais tias dej yog ib tug polar covalent molecule.

Ntxiv mus, dab tsi yog electronegativity nrog piv txwv?

Electronegativity Piv txwv Cov chlorine atom muaj ntau dua electronegativity dua li cov hydrogen atom, yog li cov khoom siv hluav taws xob yuav nyob ze rau Cl dua li H hauv HCl molecule. Cov electrons nyob rau hauv covalent daim ntawv cog lus sib koom sib npaug ntawm ob lub atoms oxygen.

Ib yam li ntawd, qhov txawv ntawm electronegativity txhais li cas? Electronegativity yog ib qho kev ntsuas ntawm atom lub peev xwm los nyiam cov electrons sib koom ntawm covalent daim ntawv cog lus rau nws tus kheej. Yog tias qhov sib txawv ntawm electronegativity loj txaus, cov electrons yuav tsis muab sib koom txhua; qhov ntau electronegative atom yuav "coj" lawv ua rau ob ions thiab ib qho ionic bond.

Dhau li ntawm no, dab tsi yog electronegativity ntawm nacl?

Sodium chloride yog ionically bonded. Ib qho hluav taws xob tau hloov ntawm sodium mus rau chlorine. Sodium muaj electronegativity ntawm 1.0, thiab chlorine muaj ib qho electronegativity ntawm 3.0. Qhov ntawd yog ib qho electronegativity Qhov sib txawv ntawm 2.0 (3.0 - 1.0), ua rau kev sib raug zoo ntawm ob lub atoms heev, heev polar.

Qhov twg yog qhov zoo tshaj plaws txhais ntawm electronegativity?

Electronegativity yog ib qho kev ntsuas ntawm qhov nyiam ntawm ib qho atom los nyiam ib khub ntawm electrons. Pauling nplai yog feem ntau siv. Fluorine (feem ntau electronegative element) tau muab tus nqi ntawm 4.0, thiab qhov tseem ceeb ntawm cesium thiab francium uas yog qhov tsawg tshaj plaws electronegative ua 0,7.

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