Cov txheej txheem:

Koj ua li cas thiaj paub tias pawg neeg twg nyob hauv?
Koj ua li cas thiaj paub tias pawg neeg twg nyob hauv?

Video: Koj ua li cas thiaj paub tias pawg neeg twg nyob hauv?

Video: Koj ua li cas thiaj paub tias pawg neeg twg nyob hauv?
Video: Nkauj Ntseeg 2023 | "Vajtswv Txoj Kev Txiav Txim Yeej Raug Nthuav Tawm Puv Npo Lawm" | Gospel Choir 2024, Kaum ib hlis
Anonim

Rau s-block ntsiab, pab pawg tooj yog sib npaug rau tus naj npawb ntawm valence electrons. Rau p-block ntsiab, pab pawg tus lej yog sib npaug rau 10 + tus lej ntawm cov hluav taws xob electrons hauv Valenceshell. Rau d-block ntsiab pab pawg tus naj npawb yog sib npaug rau cov xov tooj ntawm electrons hauv a (n-1) d subshell + tus naj npawb ntawm electronsin Valence plhaub.

Dhau li ntawm no, koj tuaj yeem qhia tau li cas pab pawg neeg lub ntsiab lus nyob hauv?

Cov cov ntsiab lus hauv ib qho pab pawg muaj pes tsawg tus electrons nyob rau sab nrauv orbital. Cov electrons sab nraud no kuj hu ua valence electrons. Lawv yog cov khoom siv hluav taws xob koom nrog kev sib koom ua ke nrog lwm yam cov ntsiab lus . Txhua keeb hauv thawj kab ( pab pawg ib) muaj ib tug electron nyob rau hauv nws outershell.

Kuj Paub, koj ua li cas txheeb xyuas cov pab pawg thiab lub sijhawm ntawm lub sijhawm teem sijhawm? Pawg thiab lub sijhawm yog ob txoj hauv kev categorizingelements hauv cov daim ntawv qhia hnub . Lub sijhawm arehorizontal kab (hli) cov daim ntawv qhia hnub , thaum pab pawg yog cov kab ntsug (down) cov rooj . Atomicnumber nce thaum koj txav mus rau a pab pawg los yog hla ib lub sij hawm.

Hais txog qhov no, dab tsi yog pawg naj npawb ntawm cov khoom?

Hauv chemistry, a pab pawg (tseem hu ua tsev neeg) isa kem ntawm cov ntsiab lus nyob rau hauv lub periodic rooj ntawm cov tshuaj cov ntsiab lus . Muaj 18 tus lej pab pawg nyob rau hauv lub sij hawm lub rooj, thiab cov kab f-block (nruab nrab pab pawg 3 thiab 4) tsis suav.

Cov pab pawg twg nyob hauv lub rooj zaum?

Pawg (lub sij hawm lub sij hawm)

  • Pawg 1: cov hlau alkali (lithium tsev neeg)
  • Pawg 2: alkaline ntiaj teb hlau (tsev neeg beryllium)
  • Pawg 3-12: kev hloov pauv hlau.
  • Pawg 13: lub triels (boron tsev neeg)
  • Pawg 14: cov tetrels (carbon tsev neeg)
  • Pawg 15: pnictogens (tsev neeg nitrogen)
  • Pawg 16: cov chalcogens (oxygen tsev neeg)

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