Qhov Tseem Ceeb Qhov Sib Txawv - Ib Feem Xyuam Ntxiv vs Tus txheeb ze abundance
Percent abundance thiab txheeb ze abundance yog feem pua ntawm cov khoom siv tshuaj uas sawv cev rau lawv qhov tshwm sim hauv ib puag ncig. Qhov sib txawv tseem ceeb ntawm feem pua kev nplua nuj thiab kev nplua nuj ntawm cov txheeb ze yog qhov feem pua kev nplua nuj muab kev nplua nuj ntawm isotopes whereas txheeb ze abundance muab cov abundance ntawm cov tshuaj. Qhov feem pua kev nplua nuj tuaj yeem siv los txiav txim siab qhov nruab nrab atomic loj ntawm qee yam tshuaj lom neeg. Cov txheeb ze nplua nuj muab qhov tshwm sim ntawm qee yam tshuaj lom neeg hauv ib puag ncig, piv txwv li, hauv ntiaj teb.
Percent Abundance yog dab tsi?
Percent abundance yog qhov feem pua ntawm tag nrho cov isotopes tshwm sim ntawm ib lub caij. Isotopes yog cov atoms ntawm tib lub caij uas muaj cov lej atomic tib yam tab sis cov lej sib txawv. Qhov no txhais tau hais tias isotopes yog atoms muaj tib tus naj npawb ntawm protons nyob rau hauv lub atomic nucleus, tab sis txawv tus naj npawb ntawm neutrons.
Daim duab 1: Isotopes ntawm Cov Khoom Sib Txawv tuaj yeem siv los nrhiav lawv qhov nruab nrab Atomic Masses
Isotopes ntawm txhua lub ntsiab lus tshwm sim nyob rau hauv qhov sib txawv. Qhov feem pua kev nplua nuj ntawm ib qho isotope qhia qhov tshwm sim ntawm kev tshawb pom tias isotope nyob rau hauv cov xwm vim hais tias cov ntsiab lus tuaj yeem pom raws li kev sib xyaw ntawm isotopes. Qhov feem pua kev nplua nuj tuaj yeem siv los nrhiav cov atomic loj ntawm lub caij. Cov atomic loj tuaj yeem pom siv qhov sib npaug hauv qab no.
Average atomic mass=∑ (ntau ntawm isotope x feem pua ntawm isotope abundance)
Cia peb ua piv txwv kom nkag siab qhov no. Qhov ruaj khov tshaj plaws, ib txwm tshwm sim ntawm cov tshuaj chlorine yog Cl-35 (ntau=34.969 thiab feem pua abundance=75.53%) thiab Cl-37 (ntau=36.966 thiab feem pua abundance=24.47%). Tom qab ntawd, Qhov nruab nrab ntawm cov tshuaj chlorine=∑ (qhov loj ntawm isotope x feem pua ntawm cov isotope ntau)
=∑ (34.969 x {75.53/100}) + (36.966 x {24.47/100})
=26.412 amu + 9.045 amu
=35.46 amu.
Tus txheeb ze nplua nuj yog dab tsi?
txheeb ze ntau ntawm ib lub caij yog ib qho kev ntsuas ntawm qhov tshwm sim ntawm cov khoom txheeb ze rau tag nrho lwm cov ntsiab lus hauv ib puag ncig. Muaj peb txoj hauv kev los txiav txim siab qhov kev nplua nuj ntawm cov khoom:
- Mass feem
- Mole feem
- Vum feem feem
Vim feem feem txoj kev yog feem ntau rau cov ntsiab lus gaseous hauv cov roj sib tov, piv txwv li, huab cua hauv ntiaj teb. Txawm li cas los xij, feem ntau cov txheeb ze kev nthuav qhia yog cov feem ntau.
Daim duab 2: Daim duab qhia txog kev txheeb ze ntawm cov ntsiab lus ntawm lub ntiaj teb sab sauv
Thaum xav txog lub ntiaj teb, cov tshuaj lom neeg ntau tshaj plaws yog hydrogen thiab helium. Thaum xav txog lub ntiaj teb, feem ntau lub ntsiab yog hlau uas nws loj feem pua yog 32.1%. Lwm cov ntsiab lus yog cov pa oxygen (32.1%), silicone (15.1%), magnesium (13.9%), sulfur (2.9%) thiab lwm cov ntsiab lus muaj nyob hauv qhov feem pua.
Dab tsi yog qhov zoo sib xws ntawm Feem pua Abundance thiab txheeb ze abundance?
- Ob feem pua kev nplua nuj thiab cov txheeb ze kev nplua nuj yog feem pua tus nqi.
- Ob feem pua kev nplua nuj thiab kev nplua nuj ntawm cov txheeb ze qhia cov feem pua ntawm cov tshuaj sib txawv.
Dab tsi yog Qhov Sib Txawv Ntawm Feem Xyuam Ntxiv thiab Kev Tshaj Lij Tshaj Lij?
Percent Abundance vs txheeb ze nplua nuj |
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| Percent abundance yog qhov feem pua ntawm tag nrho cov isotopes tshwm sim ntawm ib lub caij. | txheeb ze ntau ntawm ib lub caij yog feem pua ntawm qhov tshwm sim ntawm ib lub caij txheeb ze rau tag nrho lwm cov ntsiab lus hauv ib puag ncig. |
| Sawv cev | |
| Percent abundance muab cov abundance ntawm isotopes. | txheeb ze nplua nuj muab cov nplua nuj ntawm cov tshuaj lom neeg. |
Summary – Feem pua Abundance vs txheeb ze ntau
Percent abundance thiab txheeb ze abundance yog ob lo lus siv los muab cov abundance ntawm isotopes thiab tshuaj ntsiab. Qhov sib txawv tseem ceeb ntawm feem pua kev nplua nuj thiab kev nplua nuj ntawm cov txheeb ze yog qhov feem pua kev nplua nuj muab kev nplua nuj ntawm isotopes whereas txheeb ze abundance muab cov abundance ntawm cov tshuaj.
