Video: Dab tsi yog 4 yam khoom ntawm lub atom?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2024-01-18 08:15
- Qhov ntau thiab tsawg ntawm atom thiab nucleus.
- Feem ntau ntawm atom qhov loj yog nyob rau hauv lub nucleus.
- Cov khoom xyaw: protons, neutrons, electrons.
- Lub zog hluav taws xob tuav atom ua ke.
- Nuclear quab yuam tuav nucleus ua ke.
- Atoms, ions.
- Atomic naj npawb .
Ntawm no, dab tsi yog cov khoom ntawm atom?
Atoms muaj peb yam yooj yim hais: protons, electrons, thiab neutrons. Lub nucleus (center) ntawm lub atom muaj cov protons (zoo them) thiab cov neutrons (tsis muaj nqi). Outermost cheeb tsam ntawm lub atom hu ua electron shells thiab muaj cov electrons (negatively charged).
Tom qab ntawd, lo lus nug yog, dab tsi yog lub luag haujlwm rau lub cev lub cev ntawm lub atom? Tus naj npawb ntawm cov electrons hauv lub plhaub sab nraud ntawm ib qho atom txiav txim nws lub cev thiab tshuaj muaj zog.
Ib yam li ntawd, tej zaum koj yuav nug, qhov twg electrons muaj feem xyuam rau cov khoom ntawm lub atom?
Lub valence electrons yog cov electrons feem ntau lub luag haujlwm rau cov khoom ntawm ib lub atom.
Leej twg invented atom?
Nyob ib ncig ntawm 450 BC, Greek philosopher Democritus tau qhia lub tswv yim ntawm atom . Txawm li cas los xij, lub tswv yim tseem ceeb tsis nco qab rau ntau tshaj 2000 xyoo. Xyoo 1800, John Dalton rov qhia txog qhov atom . Nws muab pov thawj rau atoms thiab tsim atomic kev xav.
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