Video: Dab tsi yog pawg ntawm cov ntsiab lus hu ua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub rooj ntu ntu tseem muaj lub npe tshwj xeeb rau nws cov kab ntsug. Txhua kem yog hu ua ib pab pawg . Cov cov ntsiab lus hauv ib qho pab pawg muaj tib tus naj npawb ntawm electrons nyob rau sab nrauv orbital. Cov electrons sab nraud no kuj yog hu ua valence electrons.
Yog li ntawd, dab tsi yog Group A cov ntsiab lus hu ua?
Cov ntsiab lus nrog zoo sib xws reactivity yog muab tso rau hauv tib kem los yog pab pawg . Cov cov ntsiab lus hauv pab pawg IA yog hu ua cov alkali hlau. Cov cov ntsiab lus hauv pab pawg IIA yog hu ua cov alkaline ntiaj teb hlau. Cov cov ntsiab lus hauv pab pawg VIIA yog hu ua halogens thiab cov ntsiab lus hauv pab pawg VIIIA yog hu ua cov noble gases los yog inert gases.
Ib yam li ntawd, Pawg 3 cov ntsiab lus hu ua dab tsi? Plaub pab pawg 3 yam yog scandium, yttrium, lanthanum thiab actinium. "lanthanide" yog hais txog cov cov ntsiab lus nruab nrab ntawm lanthanum thiab lutetium. Lub sij hawm ntawd tsis suav nrog scandium thiab yttrium. Scandium thiab yttrium ua haujlwm zoo nkauj zoo ib yam rau lanthanides.
Hais txog qhov no, pawg B cov ntsiab lus hu ua dab tsi?
Pab pawg B cov hlau raug xa mus ua cov hlau hloov pauv. Lawv nyob rau hauv nruab nrab ntawm lub periodic rooj ntawm Pab pawg IIA thiab Pab pawg IIIA.
Dab tsi yog lwm lub npe rau cov pab pawg ntawm lub rooj zaum?
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.
Pom zoo:
Dab tsi yog lub cev muaj zog ntawm pawg 2 cov ntsiab lus?
Cov ntsiab lus suav nrog hauv pawg no suav nrog beryllium, magnesium, calcium, strontium, barium thiab radium. Lub cev muaj zog: Lub cev lub cev: Atomic Volume thiab Radius: Ceev: Melting thiab Boiling Points: Ionization Zog: Oxidation State: Electropositivity: Electronegativity:
Dab tsi yog lub ntsiab lus ntawm ib pab pawg ntawm cov lus teev sijhawm?
Nyob rau hauv chemistry, ib pab pawg (tseem hu ua tsev neeg) yog ib kem ntawm cov ntsiab lus nyob rau hauv lub sij hawm lub sij hawm ntawm cov tshuaj. Muaj 18 pawg lej nyob rau hauv daim ntawv teev sijhawm; cov kab f-block (nruab nrab ntawm pawg 3 thiab 4) tsis suav nrog
Dab tsi yog lub ntsiab lus ntawm kev hloov pauv lom neeg hauv cov ntsiab lus ntawm allele zaus?
Microevolution, los yog evolution ntawm ib tug me me, yog txhais raws li ib tug kev hloov nyob rau hauv lub zaus ntawm noob variants, alleles, nyob rau hauv ib tug pej xeem ntau tiam. Lub teb ntawm biology uas kawm txog allele frequencies nyob rau hauv cov pejxeem thiab yuav ua li cas lawv hloov lub sij hawm yog hu ua pej xeem noob caj noob ces
Vim li cas cov ntsiab lus thiab cov ntsiab lus yog cov tshuaj ntshiab?
Elements thiab compounds yog ob qho tib si piv txwv ntawm cov khoom ntshiab. Ib yam khoom uas tuaj yeem tawg mus rau hauv cov tshuaj lom neeg yooj yim dua (vim tias nws muaj ntau dua ib qho) yog ib qho khoom sib xyaw. Piv txwv li, dej yog acompound tsim los ntawm cov ntsiab lus hydrogen thiaboxygen
Puas yog cov ntsiab lus uas muaj cov tshuaj lom neeg zoo sib xws yuav pom nyob rau tib lub sijhawm lossis hauv tib pab pawg piav qhia koj cov lus teb?
Qhov no yog vim hais tias cov tshuaj muaj zog nyob ntawm tsis muaj valence electrons. Raws li nyob rau hauv ib pawg tag nrho cov ntsiab lus muaj tib yam tsis muaj valence electron uas yog vim li cas lawv muaj cov tshuaj zoo sib xws tab sis nyob rau hauv ib lub sij hawm tsis muaj valence electron sib txawv uas yog vim li cas lawv txawv nyob rau hauv chemical zog