Cov txheej txheem:

Yuav ua li cas koj kos tus qauv Lewis ntawm covalent compound?
Yuav ua li cas koj kos tus qauv Lewis ntawm covalent compound?

Video: Yuav ua li cas koj kos tus qauv Lewis ntawm covalent compound?

Video: Yuav ua li cas koj kos tus qauv Lewis ntawm covalent compound?
Video: yuav tau tsim kho tus kheej lub neej thiaj yuav vam meej tau 2024, Kaum ib hlis
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Kos Lewis cov cim ntawm tus kheej atoms hauv lub molecule . Nqa cov atoms ua ke nyob rau hauv ib txoj kev uas tso yim electrons nyob ib ncig ntawm txhua lub atom (los yog ob tug electrons rau H, hydrogen ) nyob qhov twg los tau. Txhua khub ntawm sib koom electrons yog ib covalent bond uas tuaj yeem sawv cev los ntawm tus dash.

Hais txog qhov no, koj ua li cas kos tus qauv Lewis rau ib qho kev sib txuas?

Cov lus qhia no qhia txog Kelter lub tswv yim los kos Lewis cov qauv rau cov molecules

  1. Kauj ruam 1: Nrhiav tag nrho cov naj npawb ntawm Valence Electrons.
  2. Kauj Ruam 2: Nrhiav tus naj npawb ntawm cov hluav taws xob xav tau los ua kom cov Atoms "Zoo siab"
  3. Kauj Ruam 3: Txiav txim seb tus lej ntawm daim ntawv cog lus hauv Molecule.
  4. Kauj ruam 4: Xaiv Central Atom.

Kuj Paub, koj nrhiav tau daim ntawv cog lus li cas? Yog hais tias muaj ntau tshaj ob lub atoms nyob rau hauv lub molecule, ua raws li cov kauj ruam no los txiav txim qhov nyiaj txiav txim:

  1. Kos tus qauv Lewis.
  2. Suav tag nrho cov ntawv cog lus.
  3. Suav tus naj npawb ntawm cov pab pawg ntawm cov atoms ntawm tus kheej.
  4. Faib tus naj npawb ntawm daim ntawv cog lus ntawm cov atom los ntawm tag nrho cov nyiaj pab pawg hauv cov molecule.

Ib yam li ntawd ib tug yuav nug, cov qauv dab tsi ua cov ntawv cog lus cog lus?

Covalent bonds koom nrog ob lub atoms, feem ntau nonmetals, uas qhia electron ceev rau daim ntawv kev sib raug zoo ntawm kev sib raug zoo. Covalent bonds suav nrog ib leeg, ob npaug, thiab triple daim ntawv cog lus thiab yog tsim los ntawm sigma thiab pi kev sib txuas sib txuas qhov twg 2, 4, lossis 6 electrons tau sib koom ua ke.

Tus qauv ntawm bf3 yog dab tsi?

Lub geometry ntawm molecule ntawm BF3 yog 'Trigonal Planar. ' Nrog rau kev siv ntawm Chemistry, 'Trigonal Planar' yog ib qho qauv nrog peb lub atoms nyob ib ncig ntawm ib lub atom hauv nruab nrab. Nws zoo li peripheral atoms tag nrho hauv ib lub dav hlau, vim tias tag nrho peb ntawm lawv zoo ib yam nrog 120 ° daim ntawv cog lus ntawm txhua qhov uas ua rau lawv ua ib daim duab peb sab sib npaug.

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