Cov txheej txheem:
Video: Dab tsi yog tus ntxhais lub ntsiab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev txhais ntawm ntxhais element . Cov keeb tsim thaum muaj hluav taws xob keeb undergoes radioactive lwj. Cov tom kawg hu ua niam txiv. Cov tus ntxhais tej zaum yuav los yog tsis yog radioactive. Ref: CCD, 2.
Hais txog qhov no, dab tsi yog ib tug ntxhais khoom?
Hauv nuclear physics, kev lwj khoom (tseem hu ua a tus ntxhais khoom , tus ntxhais Isotope, xov tooj cua tus ntxhais , los yog tus ntxhais nuclide) yog cov nuclide uas tseem tshuav los ntawm cov hluav taws xob tawg. Radioactive decay feem ntau tshwm sim los ntawm ib theem zuj zus ntawm cov kauj ruam (txoj kab lwj).
Tsis tas li ntawd, tus ntxhais lub ntsiab ntawm carbon 14 yog dab tsi? Los ntawm emitting ib tug electron thiab ib tug electron antineutrino, ib tug ntawm cov neutrons nyob rau hauv lub carbon-14 atom decays mus rau ib tug proton thiab cov carbon-14 (ib nrab-lub neej ntawm 5,700 ± 40 xyoo) decays mus rau hauv lub ruaj khov (non-radioactive) isotope nitrogen-14.
Tsis tas li ntawd, tus ntxhais lub ntsiab ntawm potassium 40 yog dab tsi?
RADIOMETRIC SIJ HAWM
| Niam Txiv Isotope | Cov khoom ruaj khov ntxhais | Tam sim no lees txais Ib Nrab-Lub Neej Tus Nqi |
|---|---|---|
| Uranium-235 | Cov-207 | 704 lab xyoo |
| Thorium-232 | Cov-208 | 14.0 billion xyoo |
| Rubidium-87 | Strontium-87 | 48.8 billion xyoo |
| Potassium - 40 | Argon-40 | 1.25 billion xyoo |
Yuav ua li cas koj txheeb xyuas tus ntxhais isotope?
Isotopes thiab Radioactivity Tutorial
- Cov ntsiab lus yog txhais los ntawm tus naj npawb ntawm cov protons, zoo them subatomic hais, nyob rau hauv ib tug atom lub nucleus.
- Thaum ib qho isotope emits ib qho alpha particle, cov khoom tsim tau tus ntxhais muaj tus lej atomic ob units tsawg dua nws niam nws txiv tus lej atomic, thiab atomic hnyav plaub units tsawg dua nws niam nws txiv qhov hnyav atomic.
Pom zoo:
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