Puas yuav fluorine tsim cov ntawv cog lus?
Puas yuav fluorine tsim cov ntawv cog lus?

Video: Puas yuav fluorine tsim cov ntawv cog lus?

Video: Puas yuav fluorine tsim cov ntawv cog lus?
Video: DA VANG / HISO - KOJ PUAS YUAV (nkauj tawm tshiab 2021) 2024, Kaum ib hlis
Anonim

Nrog rau lwm cov atoms, fluorine cov ntaub ntawv los yog polarcovalent daim ntawv cog lus los yog ionic daim ntawv cog lus . Feem ntau, covalent daim ntawv cog lus koom nrog tshuaj fluorine atoms yog ib leeg daim ntawv cog lus , txawm tias tsawg kawg yog ob qho piv txwv ntawm kev txiav txim siab dua daim ntawv cog lus muaj. Fluoride tuaj yeem ua raws li kev sib txuas ntawm ligand nruab nrab ntawm ob cov hlau hauv qee cov molecules complex.

Ua li no, hom kev sib cog lus twg yog tsim los ntawm fluorine thiab fluorine?

Cov hom ntawv cog lus uas feem ntau yuav yog tsim ntawm ob tshuaj fluorine atoms yog nonpolarcovalent daim ntawv cog lus . Hluav taws xob nruab nrab ob tug tshuaj fluorine atoms sib koom nruab nrab lawv.

Ib tug kuj nug, fluorine puas tuaj yeem tsim ob daim ntawv cog lus? Fluorine muaj xya valence electrons thiab mob tsuas yog ib qho hluav taws xob los ua kom tiav nws cov octet. Yog li ntawd, fluorine cov ntaub ntawv ib leeg xwb daim ntawv cog lus nyob rau hauv zoo tag nrho ntawm nws covalent compounds. Txawm li cas los xij, tshuaj fluorine tej zaum yuav nthuav tawm qee qhov ob daim ntawv cog lus tus cwj pwm nyob rau hauv cov tebchaw xws li BF3 thiab nyob rau hauv lub xeev zoo siab ntawm ib co lwm yam molecules.

Ib sab saum toj no, pes tsawg daim ntawv cog lus tuaj yeem tsim tau fluorine?

Nws muaj 9 electrons, 2 core thiab 7 valence. Ntau dua kev ua 7 daim ntawv cog lus , tshuaj fluorine nkaus xwb daim ntawv ib tug singlebond rau qhov pib tib yam yog vim li cas oxygen xwb daim ntawv ob daim ntawv cog lus . Hydrogen fluoride, HF, muaj ib daim ntawv cog lus, tab sis plaub qhov chaw ntawm electron ceev nyob ib ncig ntawm tshuaj fluorine.

Puas muaj fluorine puas tuaj yeem tsim ib daim ntawv cog lus nonpolar?

(a) Fluorine tuaj yeem ua ionic daim ntawv cog lus (xws li NaF), nonpolar covalent bonds (xws li hauv F2), thiab polar covalent bonds (xws li hauv HF). Fluorine thiab lwm cov atoms hauv peb daim ntawv cog lus hom txhua yam muaj qhov ruaj khov ntawm cov electrons. Fluorine yog ib txwm qhov zoo kawg ntawm lub daim ntawv cog lus.

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