Covalent bonding txhais li cas?
Covalent bonding txhais li cas?

Video: Covalent bonding txhais li cas?

Video: Covalent bonding txhais li cas?
Video: Coordinate Covalent Bond 2024, Kaum ib hlis
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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. Rau ntau lub molecules, kev sib koom ntawm cov hluav taws xob tso cai rau txhua lub atom kom ncav cuag qhov sib npaug ntawm lub plhaub sab nraud, sib xws rau cov khoom siv hluav taws xob ruaj khov.

Ua raws li qhov no hauv kev txiav txim siab, dab tsi yog kev sib koom ua ke thiab cov 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.

Ib tug kuj yuav nug, dab tsi ua rau muaj kev sib cog lus? Covalent bonding tshwm sim thaum khub ntawm electrons sib koom los ntawm atoms. Atoms yuav covalently daim ntawv cog lus nrog rau lwm cov atoms nyob rau hauv thiaj li yuav tau txais ntau stability, uas yog tau los ntawm kev tsim ib tug tag nrho electron plhaub. Los ntawm kev sib koom lawv sab nrauv feem ntau (valence) electrons, atoms tuaj yeem sau lawv lub plhaub hluav taws xob sab nraud thiab tau txais kev ruaj ntseg.

Ib yam li ib tug yuav nug, 3 hom kev sib cog lus yog dab tsi?

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 xws.

Ib qho piv txwv ntawm covalent compound yog dab tsi?

Yog koj tshuaj xyuas lo lus, covalent , nws txhais tau tias nrog valence electrons. Cov no tshuaj sib xyaw yog tsim thaum ob lub hlau tsis sib xyaw ua ke. Qee yam piv txwv yog dej, H2O, carbon dioxide, CO2 ', thiab hydrogen gas uas yog diatomic, H2.

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