Qhov sib txawv tseem ceeb ntawm carbon 12 thiab carbon 14 yog tias carbon 12 muaj 6 neutrons hauv nws cov atomic nucleus whereas carbon 14 muaj 8 neutrons.
Carbon 12 thiab Carbon 14 yog isotopes ntawm carbon atom. Carbon atom ib txwm muaj 6 protons. Nws feem ntau muaj 6 neutrons ib yam nkaus, uas yog vim li cas peb hu nws cov pa roj carbon 12. Tab sis qee zaus muaj 8 neutrons es tsis txhob 6, uas yog thaum nws dhau los ua carbon 14. Hauv cov tshuaj tiv thaiv, carbon 12 thiab carbon 14 coj zoo ib yam. Feem ntau, carbon muaj nyob rau hauv C 12 lub xeev, tab sis qee zaus nws kuj muaj xws li C 14.
carbon 12 yog dab tsi?
Carbon 12 yog qhov feem ntau ntawm cov pa roj carbon isotope, ntawm huab hwm coj 12. Nws yog lub hauv paus rau kev lees paub ntawm atomic mass units. Qhov ntau ntawm cov pa roj carbon monoxide no yog nyob ib ncig ntawm 99%.
Daim duab 1: Carbon Atom
Tsis tas li ntawd, cov pa roj carbon atom no muaj 6 protons, 6 electrons, thiab 6 neutrons. Peb tuaj yeem pom cov carbon 12 scientifically li 12C. Nws cov isotopic mass yog 12 u.
carbon 14 yog dab tsi?
Carbon 14 yog ib qho isotope ntawm carbon. Peb hu nws "radiocarbon" vim nws yog ib qho hluav taws xob carbon isotope. Lub atomic nucleus ntawm no atom muaj 6 protons, 6 electrons, thiab 8 neutrons. Nws cov isotopic mass yog 14 u. Ntxiv mus, Carbon 14 yog qhov tsawg heev, thiab nws qhov kev nplua nuj yog li 1 feem ntawm ib trillion.
Daim duab 2: Xov tooj cua Decay ntawm Carbon 14
Vim C 14 yog ib qho isotope tsis ruaj tsis khov ntawm Carbon atom, nws dhau mus rau cov hluav taws xob tawg. Thiab, qhov no yog txheej txheem uas tshwm sim rau txhua qhov isotope tsis ruaj khov thiab yog txheej txheem ntuj tsim. Nws yog cov cuab yeej tshwj xeeb ntawm C 14 thiab siv rau kev txiav txim siab ntawm cov khoom uas muaj ntau txhiab xyoo thiab siv dav hauv archaeology. Lub neej ib nrab ntawm C 14 yog 5730 xyoo.
Qhov txawv ntawm Carbon 12 thiab Carbon 14 yog dab tsi?
C 12 thiab C 14 yog isotopes ntawm carbon atom. Qhov sib txawv tseem ceeb ntawm carbon 12 thiab carbon 14 yog tias carbon 12 muaj 6 neutrons hauv nws cov atomic nucleus thaum carbon 14 muaj 8 neutrons. Txij li qhov hnyav ntawm protons thiab neutrons yog tib yam, muaj 8 neutrons, C 14 yog 20% hnyav dua C 12. Tsis tas li ntawd, vim hais tias ob qho tib si C 12 thiab C 14 muaj tib tus naj npawb ntawm cov protons, lawv cov lej atomic yog tib yam, tab sis lawv Qhov hnyav atomic sib txawv vim qhov sib txawv ntawm cov neutrons. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm C 12 thiab C 14.
Ntxiv mus, C 12 thiab C 14 kuj coj txawv txawv thaum nws los txog rau kev tawm tsam nuclear. Tsis tas li ntawd, qhov sib txawv ntxiv ntawm C 12 thiab C 14 yog qhov C 12 pom muaj ntau nyob rau hauv lub ntiaj teb crust thaum C 14 tsis tshua muaj. Tsis tas li ntawd, C 12 yog ib qho isotope ruaj khov ntawm Carbon thaum C 14 yog ib qho tsis ruaj khov isotope ntawm Carbon atom thiab undergoes radioactive decay.
Summary – Carbon 12 vs Carbon 14
Carbon 12 thiab Carbon 14 yog isotopes ntawm carbon atom. Cov pa roj carbon atom ib txwm muaj 6 protons, tab sis tus naj npawb ntawm neutrons tuaj yeem sib txawv. Piv txwv li, carbon 12 thiab carbon 14 yog cov isotopes sib txawv ntawm cov pa roj carbon monoxide sib txawv ntawm cov neutrons. Yog li, qhov sib txawv tseem ceeb ntawm carbon 12 thiab carbon 14 yog tias carbon 12 muaj 6 neutrons hauv nws cov atomic nucleus thaum carbon 14 muaj 8 neutrons.
