Qhov sib txawv ntawm atomic mass unit thiab atomic mass yog qhov atomic mass unit yog chav tsev uas peb siv los ntsuas qhov loj ntawm ib lub atom where the atomic mass yog qhov loj ntawm ib qho atom.
Qhia qhov hnyav ntawm atoms lossis molecules yog qhov teeb meem rau cov kws tshawb fawb thaum ntxov. Txij li cov atoms me me heev, peb tsis tuaj yeem ntsuas lawv cov huab hwm coj siv li niaj zaus xws li kilograms lossis grams lossis txawm nyob rau hauv micrograms. Yog li ntawd, cov kws tshawb fawb tau los nrog lub tswv yim tshiab los ntsuas cov no.
Atomic Mass Unit yog dab tsi?
Cov pawg ntawm atoms tsawg heev. Yog li, peb tsis tuaj yeem qhia lawv hauv cov chav loj ib txwm zoo li grams lossis kilograms. Yog li, peb yuav tsum siv lwm chav hu ua atomic mass unit (amu) los ntsuas qhov atomic mass. Ib qho atomic mass unit yog ib feem kaum ntawm qhov loj ntawm C-12 isotope, uas yog 1.66 X 10−27 kg. Thaum peb faib qhov loj ntawm ib qho atom los ntawm ib feem kaum ntawm qhov loj ntawm C-12 isotope, peb tuaj yeem tau txais nws cov txheeb ze. Thiab, tus nqi no yog tus lej me me, uas yooj yim siv hauv kev suav thiab rau lwm lub hom phiaj. Txawm li cas los xij, feem ntau siv, thaum peb hais qhov txheeb ze atomic loj ntawm lub caij, peb txhais tau tias lawv qhov hnyav atomic (vim peb suav nws suav nrog tag nrho cov isotopes).
Ua ntej siv cov pa roj carbon-12 raws li tus qauv ntsuas lub ntsuas atomic, tib neeg siv lwm cov ntsiab lus. Piv txwv li, H-1 tau siv ua ntej. Tom qab ntawd, lawv hloov qhov no txhawm rau txo qhov yuam kev. Tom qab ntawd, lawv siv cov khoom uas muaj ntau dua. Cov txheej txheem tom ntej yog oxygen-16. Tom qab ntawd, nrog kev tshawb pom ntawm qhov muaj oxygen isotopes thiab lwm yam teeb meem cuam tshuam nrog nws, atomic mass unit tau ntsuas txheeb ze rau carbon-12 isotope.
Atomic Mass yog dab tsi?
Atoms feem ntau muaj cov protons, neutrons thiab electrons. Atomic mass tsuas yog qhov loj ntawm lub atom. Nyob rau hauv lwm yam lus, nws yog sau los ntawm masses ntawm tag nrho cov neutrons, protons thiab electrons nyob rau hauv ib tug tib atom, tshwj xeeb tshaj yog, thaum lub atom tsis txav (so mass). Peb yuav tsum noj cov khoom seem vim hais tias, raws li cov hauv paus ntsiab lus ntawm physics, thaum atoms tsiv ntawm qhov nrawm heev, cov huab hwm coj nce.
Daim duab 01: Atomic Mass ntawm Mercury yog 200.59 amu
Txawm li cas los xij, qhov loj ntawm electrons yog qhov me me piv rau qhov loj ntawm protons thiab neutrons. Yog li ntawd, peb tuaj yeem hais tias qhov kev koom tes ntawm ib qho hluav taws xob rau cov atomic loj yog tsawg. Feem ntau ntawm cov atoms nyob rau hauv lub periodic table muaj ob los yog ntau tshaj isotopes. Isotopes txawv ntawm ib leeg los ntawm kev muaj ntau tus lej ntawm neutrons, txawm tias lawv muaj tib yam proton thiab electron npaum li cas. Txij li thaum lawv cov neutron ntau sib txawv, txhua isotope muaj qhov sib txawv atomic mass. Qhov nruab nrab ntawm tag nrho cov isotope loj yog qhov hnyav atomic. Yog li ntawd, qhov loj ntawm ib qho isotope yog cov atomic loj hauv ib lub atom, uas muaj ob peb isotopes.
Qhov txawv ntawm Atomic Mass Unit thiab Atomic Mass yog dab tsi?
Atomic mass yog qhov loj ntawm ib qho atom tshwj xeeb (tsis suav qhov nruab nrab loj ntawm isotopes). Atomic mass unit yog 1/12th ntawm cov pa roj carbon -12 isotope. Yog li, qhov sib txawv tseem ceeb ntawm atomic mass unit thiab atomic mass yog tias atomic mass unit yog chav tsev uas peb siv los ntsuas qhov loj ntawm ib lub atom whereas atomic mass yog qhov loj ntawm ib qho atom. Ntxiv mus, peb tuaj yeem siv atomic mass unit los qhia cov txheeb ze ntawm lwm cov atoms nyob rau hauv txheeb ze rau C-12 pawg.
Cov lus qhia hauv qab no ntawm qhov sib txawv ntawm atomic mass unit thiab atomic mass summarizes tag nrho cov sib txawv.
Summary – Atomic Mass Unit vs Atomic Mass
Atomic mass unit yog chav ntsuas ntawm atomic mass ntawm ib lub atom. Qhov sib txawv tseem ceeb ntawm atomic mass unit thiab atomic mass yog qhov atomic mass unit yog chav tsev uas peb siv los ntsuas qhov loj ntawm lub atom whereas lub atomic mass yog qhov loj ntawm ib qho atom.
