Video: Lub sij hawm periodic tsim li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov credit rau creation ntawm lub daim ntawv qhia hnub Feem ntau mus rau chemist Dmitri Mendeleev. Xyoo 1869, nws tau sau cov ntsiab lus paub (uas muaj 63 thaum lub sijhawm) ntawm daim npav thiab muab lawv tso rau hauv kab thiab kab raws li lawv cov khoom siv tshuaj thiab lub cev.
Raws li kev sib raug zoo, dab tsi yog nyob rau hauv lub sij hawm?
Nyem daim duab mus saib los yog download tau lub daim ntawv qhia hnub ntawm cov khoom.
Lub Sijhawm Sijhawm nrog Element Names thiab Electronegativity.
| Lub Npe Lub Npe | Arsenic |
|---|---|
| Cim | Raws li |
| Atomic Number | 33 |
| Electronegativity (x) | 2.18 |
Ib tug kuj yuav nug, vim li cas lub sij hawm tsim? Lavxias teb sab chemist Dmitri Mendeleev luam tawm thawj pom daim ntawv qhia hnub xyoo 1869, tsim tawm feem ntau los piav qhia raws sij hawm trends ntawm lub ces-paub hais. Nws kuj tau kwv yees qee yam khoom ntawm cov ntsiab lus tsis paub tseeb uas xav tias yuav ua rau muaj qhov tsis sib xws hauv qhov rooj . Feem ntau ntawm nws qhov kev kwv yees tau ua pov thawj tias muaj tseeb.
Xav txog qhov no, lub sijhawm teem sijhawm ua ntej Mendeleev li cas?
John Newlands. Tsuas yog plaub xyoos xwb ua ntej Mendeleev tshaj tawm nws daim ntawv qhia hnub , Newlands pom tias muaj qhov zoo sib xws ntawm cov ntsiab lus nrog qhov hnyav atomic uas txawv ntawm xya. Nws hu qhov no Txoj Cai ntawm Octaves, kos ib qho kev sib piv nrog cov suab paj nruag octaves. Noble gases (Helium, Neon, Argon thiab lwm yam)
Cov khoom npe li cas?
Tshiab cov ntsiab lus tuaj yeem yog npe tom qab ib tug mythological tswvyim, ib tug ntxhia, ib qho chaw los yog lub teb chaws, ib tug vaj tse los yog ib tug kws tshawb fawb. Cov npe yuav tsum tau tshwj xeeb thiab tswj "keeb kwm thiab tshuaj sib xws". Tseem tsis tau muaj leej twg npe ib keeb tom qab lawv tus kheej tab sis ntau cov khoom muaj npe nyob rau hauv tribute rau cov kws tshawb fawb tseem ceeb.
Pom zoo:
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