Video: Qhov loj ntawm lub rooj zaum nyob qhov twg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nyob rau daim ntawv qhia hnub , cov pawg tus lej feem ntau yog nyob hauv qab no keeb cim. Cov pawg tus lej teev yog qhov nruab nrab pawg ntawm tag nrho cov lub ntsiab isotopes. Txhua lub isotope muaj qee feem pua ntawm qhov muaj nyob hauv qhov, thiab cov no ntxiv thiab nruab nrab kom tau txais qhov nruab nrab. pawg tus lej.
Kuj nug, dab tsi yog qhov loj ntawm lub rooj zaum?
Lub atomic pawg ntawm ib keeb yog qhov nruab nrab pawg ntawm cov atom ntawm ib keeb ntsuas hauv atomic pawg unit (amu, tseem hu ua daltons, D). Lub atomic pawg yog qhov hnyav nruab nrab ntawm tag nrho cov isotopes ntawm qhov ntawd keeb , hauv cov pawg ntawm txhua tus isotope yog muab faib los ntawm kev nplua nuj ntawm cov isotope tshwj xeeb.
Qhov thib ob, lub atomic loj nyob qhov twg? Pawg Number Experimental cov ntaub ntawv qhia tias feem coob ntawm cov pawg ntawm ib atom yog concentrated nyob rau hauv nws cov nucleus, uas yog tsim los ntawm protons thiab neutrons. Cov pawg tus naj npawb (sawv cev los ntawm tsab ntawv A) txhais tau tias yog tag nrho cov protons thiab neutrons hauv ib qho atom.
Tsis tas li ntawd, tus lej loj nyob qhov twg ntawm daim ntawv teev sijhawm?
Hmoov tsis zoo, tus pawg naj npawb tsis muaj npe nyob rau hauv Rooj ntawm Elements. Zoo siab, nrhiav tus pawg naj npawb , txhua yam koj yuav tau ua yog puag ncig lub atomic hnyav rau qhov ze tshaj plaws tus lej . Hauv peb qhov piv txwv, krypton's pawg naj npawb yog 84 o atomic hnyav, 83.80, rounds mus txog 84.
Dab tsi yog atomic mass number?
Cov pawg naj npawb (Symbol A, los ntawm German lo lus Atomgewicht [ atomic luj]), kuj hu ua atomic loj naj npawb los yog nucleon tus lej , yog tag nrho tus lej ntawm protons thiab neutrons (ua ke hu ua nucleons) hauv ib atomic nucleus. Cov pawg naj npawb Nws txawv rau txhua qhov sib txawv ntawm cov isotope ntawm cov khoom siv tshuaj.
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