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Yuav ua li cas koj nrhiav tau tus naj npawb ntawm covalent bonds nyob rau hauv ib tug compound?
Yuav ua li cas koj nrhiav tau tus naj npawb ntawm covalent bonds nyob rau hauv ib tug compound?

Video: Yuav ua li cas koj nrhiav tau tus naj npawb ntawm covalent bonds nyob rau hauv ib tug compound?

Video: Yuav ua li cas koj nrhiav tau tus naj npawb ntawm covalent bonds nyob rau hauv ib tug compound?
Video: YUAV COJ LI CAS TU NEEG KOJ HLUB THIAJ NCO KOJ 2024, Kaum ib hlis
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Cov tus lej ntawm daim ntawv cog lus rau ib tug nruab nrab atom yog sib npaug rau cov tus lej ntawm electrons nyob rau hauv tag nrho valence plhaub (2 los yog 8 electrons) rho tawm tus lej ntawm valence electrons. Txoj kev no ua haujlwm vim txhua tus covalent bond tias cov ntawv atom ntxiv lwm cov hluav taws xob rau lub atoms valence plhaub yam tsis hloov nws cov nqi.

Tsuas yog li ntawd, lub compound twg muaj covalent bonds?

Piv txwv ntawm tshuaj sib xyaw uas muaj nkaus xwb 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.

Ib tug kuj yuav nug, pes tsawg covalent bonds ib atom tuaj yeem tsim tau? Hydrogen atom tuaj yeem tsim 1 daim ntawv cog lus, carbon atom tuaj yeem tsim 4 bonds, nitrogen atom tuaj yeem tsim 3 daim ntawv cog lus thiab cov pa oxygen atom tuaj yeem tsim 2 daim ntawv cog lus. Cia peb rhuav cov lus nug. Firstly covalent bonding yog muaj zog electrostatic zog ntawm attraction ntawm sib koom khub ntawm valence electrons thiab nucleus.

Xav txog qhov no, 5 piv txwv ntawm covalent bonds yog dab tsi?

Piv txwv ntawm Covalent Bond:

  • Dej. Ib qho piv txwv yog dej. Dej muaj covalent daim ntawv cog lus uas muaj hydrogen thiab oxygen bonding ua ke los ua H2O.
  • Pob zeb diamond. Lub pob zeb diamond yog ib qho piv txwv ntawm Giant Covalent daim ntawv cog lus ntawm carbon. Lub pob zeb diamond muaj cov qauv loj heev.
  • Vulcanized roj hmab. Lwm qhov piv txwv yog vulcanized roj hmab.

Dab tsi yog 3 hom ntawm covalent bonds?

Cov peb hom raws li tau hais nyob rau hauv lwm cov lus teb yog polar covalent , tsis muaj polar covalent , thiab kev sib koom tes covalent . Thawj, polar covalent , yog tsim los ntawm ob lub nonmetals uas muaj qhov sib txawv hauv electronegativity. Lawv qhia lawv cov electron ceev tsis sib npaug.

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