Video: Dab tsi yog lub ntsiab lus thib peb ntawm lub rooj zaum?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lithium yog lub thib 3 ntawm lub sij hawm ntawm lub ntsiab lus.
Ntxiv mus, dab tsi yog lub ntsiab lus thib peb?
Qhov thib peb . ib lub sij hawm, nrov nyob rau hauv 1900's, hais txog cov tswv cuab ntawm cov neeg txawj ntse ntawm tsis muaj cov chav kawm tshwj xeeb uas raug ntiav los ua haujlwm hauv zemstvo (tsoom fwv hauv zos) raws li agronomists, statisticians, kws tshaj lij, kws kho mob, kws kho tsiaj, kws qhia ntawv, thiab cov neeg saib xyuas kev pov hwm.
Ib tug kuj yuav nug, dab tsi yog 3 lub ntsiab lus uas ploj lawm hauv lub rooj zaum? Nws yog tom qab ntawd tau txheeb xyuas tias yog gallium. Gallium, germanium, thiab scandium tau Tag nrho cov tsis paub nyob rau hauv 1871, tab sis Mendeleev tshuav qhov chaw rau txhua tus thiab kwv yees lawv atomic masses thiab lwm yam tshuaj. Hauv 15 xyoo, ploj lawm ” cov ntsiab lus tau nrhiav pom, ua raws li cov yam ntxwv tseem ceeb Mendeleev tau sau tseg.
Ua li no, dab tsi yog 3 chav kawm tseem ceeb ntawm cov ntsiab lus ntawm lub rooj zaum?
Peb lub ntsiab ntawm cov ntsiab lus yog hlau nyob rau sab laug, metalloids ntawm lub staircase, thiab nonmetals ntawm sab tes xis.
Dab tsi yog Pawg 14 ntawm lub rooj sib tham hu ua?
Cov pa roj carbon pab pawg yog a pab pawg hnub nyoog muaj carbon (C), silicon (Si), germanium (Ge), tin (Sn), lead (Pb), thiab flerovium (Fl). Nyob rau hauv niaj hnub IUPAC cim, nws yog npe Group 14 . Nyob rau hauv lub teb ntawm semiconductor physics, nws tseem universally hu ua Group IV.
Pom zoo:
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Hydrogen yog thawj lub hauv paus ntawm lub rooj sib tham, nrog qhov nruab nrab atomic loj ntawm 1.00794
Dab tsi yog cov ntsiab lus xiav ntawm lub rooj zaum?
Xiav. Ob lub ntsiab lus uas nws lub npe tau muab los ntawm cov xim xiav yog indium (atomic tooj 49) thiab cesium (55)
Dab tsi yog lub ntsiab lus 16 ntawm lub rooj zaum?
Sulfur yog cov khoom siv tshuaj uas sawv cev nrog cov cim tshuaj 'S' thiab tus naj npawb atomic 16 ntawm lub sijhawm teem sijhawm. Selenium yog cov hlau tsis muaj hlau thiab tuaj yeem muab piv rau nws cov khoom tsis yog hlau uas muaj nyob hauv Pawg 16: Cov Tsev Neeg Oxygen, xws li sulfur thiab tellurium
Lub npe ntawm tag nrho cov ntsiab lus ntawm lub sij hawm lub rooj yog dab tsi?
Tus lej xov tooj yog nws tus lej atomic, uas yog tus naj npawb ntawm protons hauv txhua qhov ntawm nws cov atoms. H - Hydrogen. Nws - Helium. Lithium roj teeb. Ua - Beryllium. B - Boron. C - Cov pa roj carbon. N - Nitrogen. O - Cov pa