Cov txheej txheem:

Dab tsi yog lub ntsiab lus ntawm ib pab pawg ntawm cov lus teev sijhawm?
Dab tsi yog lub ntsiab lus ntawm ib pab pawg ntawm cov lus teev sijhawm?
Anonim

Hauv chemistry, a pab pawg (tseem hu ua tsev neeg) yog ib kem ntawm cov ntsiab lus hauv daim ntawv qhia hnub ntawm cov tshuaj chemical. Muaj 18 tus lej pab pawg hauv daim ntawv qhia hnub ; cov kab f-block (nruab nrab pab pawg 3 thiab 4) tsis suav nrog.

Ib yam li ntawd, dab tsi yog ib pab pawg ntawm lub rooj zaum?

A pab pawg yog ib kem ntawm lub daim ntawv qhia hnub . Cov ntsiab lus zoo ib yam pab pawg feem ntau muaj cov khoom zoo sib xws, vim tias lawv muaj tib tus lej ntawm cov hluav taws xob hauv lub plhaub sab nraud. Muaj yim lub ntsiab pab pawg ntawm cov ntsiab lus, naj npawb 1, 2, thiab 13-18. Pab pawg 1: cov hlau alkali (lithium tsev neeg) * tsis suav nrog hydrogen.

Ib yam li ntawd, dab tsi yog pab pawg hauv chemistry? Pab pawg Txhais: Hauv chemistry , a pab pawg yog ib kab ntsug nyob rau hauv Lub Sijhawm Table. Pawg tuaj yeem raug xa mus rau tus lej lossis los ntawm lub npe. Piv txwv li, Pab pawg 1 tseem hu ua Alkali Metals.

Ua raws li qhov no, dab tsi yog 8 pawg ntawm lub rooj zaum?

Cov npe hauv qab no rau cov pab pawg tshwj xeeb hauv cov ntawv teev sijhawm yog siv ntau:

  • Pawg 1: alkali hlau.
  • Pawg 2: alkaline ntiaj teb hlau.
  • Pawg 11: nyiaj npib hlau (tsis yog IUPAC pom zoo lub npe)
  • Pawg 15: pnictogens (tsis yog IUPAC pom zoo lub npe)
  • Pawg 16: chalcogens.
  • Pawg 17: halogens.
  • Pawg 18: cov pa roj.

Yuav ua li cas cov pab pawg nyob rau hauv lub periodic table?

Pawg ntawm daim ntawv qhia hnub . Cov ntsiab lus s-, p-, thiab d-block ntawm cov daim ntawv qhia hnub tau teem rau hauv 18 suav kem, lub pab pawg . Cov ntsiab lus hauv txhua pab pawg muaj ib yam tus lej ntawm valence electrons. Yog li ntawd, cov ntsiab lus hauv tib yam pab pawg feem ntau tso saib cov khoom zoo sib xws thiab reactivity.

Pom zoo: