Video: Yam khoom twg yog hydrogen?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ntawm qhov ntsuas kub thiab siab, hydrogen yog cov xim tsis muaj xim, tsis muaj ntxhiab, tsis qab, tsis muaj tshuaj lom, tsis yog xim hlau, cov pa roj carbon diatomic nrog cov mis molecular H2. Txij li thaum hydrogen yooj yim tsim covalent compounds nrog feem ntau nonmetallic cov ntsiab lus , feem ntau ntawm hydrogen Nyob rau hauv lub ntiaj teb no muaj nyob rau hauv cov ntaub ntawv molecular xws li dej
Ua raws li qhov no hauv kev txiav txim siab, dab tsi yog hydrogen cais raws li hauv daim ntawv teev sijhawm?
Hydrogen yog cais as ib keeb nyob rau hauv seem 'Non-Hom' uas tuaj yeem nyob hauv pawg 14, 15 thiab 16 ntawm Lub Sijhawm Sijhawm . Cov khoom uas tsis yog-hlau muaj nyob, nyob rau hauv chav tsev kub, nyob rau hauv ob ntawm peb lub xeev ntawm teeb meem: gases (Oxygen, Hydrogen & Nitrogen) thiab cov khib nyiab (Carbon, Phosphorus, Sulfur thiab Selenium).
Ib sab saum toj no, puas yog hydrogen ib qho khoom lossis cov khoom sib xyaw? Hydrogen gas (H2) yog molecule, tab sis tsis yog ib compound vim nws yog ua los ntawm ib tug xwb keeb . Dej (H2O) tuaj yeem hu ua molecule lossis a compound vim nws yog ua los ntawm hydrogen (H) thiab oxygen (O) atoms. Muaj ob lub ntsiab ntawm cov khoom sib txuas uas tuav cov atoms ua ke: covalent thiab ionic / electrovalent bonds.
Ib yam li ntawd, dab tsi yog hydrogen?
Hydrogen yog cov tshuaj lom neeg nrog lub cim H thiab atomic tooj 1. Nws muaj tus qauv atomic hnyav ntawm 1.008, txhais tau tias nws yog lub teeb tshaj plaws nyob rau hauv lub sij hawm. Hydrogen yog cov tshuaj lom neeg ntau tshaj plaws hauv ntiaj teb, nrog 75% ntawm tag nrho cov baryonic pawg hydrogen . Cov hnub qub yog tsim los ntawm feem ntau hydrogen.
Cov xim dab tsi yog hydrogen ntawm lub rooj zaum?
Hydrogen , H, yog qhov lightest keeb pom ntawm lub daim ntawv qhia hnub ntawm cov ntsiab lus. Hauv chav sov, hydrogen yog xim tsis muaj ntxhiab, tsis muaj ntxhiab, thiab tasteless.
Pom zoo:
Dab tsi yog 5 yam khoom ntawm cov khoom?
Cov khoom uas pom tau tias tuaj yeem tshawb pom nrog tsib qhov kev xav muaj xws li cov duab, xim, kev ntxhib los mos, hardness, luster, buoyancy, tsw, thiab saj. Cov khoom ntsuas muaj xws li qhov loj, ntim, qhov hnyav, qhov hnyav, qhov ntom, thiab qhov kub thiab txias
Yuav ua li cas koj thiaj paub tias ib yam dab tsi yog ib yam khoom dawb huv los yog sib tov?
1. Cov tshuaj dawb huv tsis tuaj yeem muab cais ua lwm yam teeb meem, thaum sib xyaw yog sib xyaw ntawm ob lossis ntau dua cov khoom ntshiab. 2. Cov khoom ntshiab muaj lub cev tsis tu ncua thiab tshuaj lom neeg, thaum cov khoom sib xyaw muaj qhov sib txawv ntawm lub cev thiab tshuaj lom neeg (piv txwv li, qhov kub thiab txias)
Yam khoom twg muaj zog dua hydrogen lossis van der Waals?
Hydrogen bonds feem ntau muaj zog dua Van der Waals rog. Cov ntawv cog lus no ntev ntev thiab zoo nkauj heev. Van der Waals rog yog raws li cov dipoles ib ntus uas tsim thaum cov molecules nyob rau hauv lub xeev ntawm flux los yog txav
Cov khoom twg yog cov piv txwv ntawm cov khoom siv tshuaj xyuas txhua yam uas siv?
Piv txwv ntawm cov khoom siv tshuaj muaj xws li flammability, toxicity, acidity, reactivity (ntau hom), thiab kub ntawm combustion. Hlau, piv txwv li, ua ke nrog oxygen nyob rau hauv lub xub ntiag ntawm dej los ua xeb; chromium tsis oxidize (Daim duab 2)
Yam khoom twg ua rau hluav taws xob hauv ob qho tib si khoom thiab molten?
Cov delocalized electrons no muaj nyob rau hauv ob qho tib si ib qho khoom thiab molten, yog li sodium tuaj yeem ua hluav taws xob hauv ob lub xeev. Sodium iodide yog heteroatomic, thiab electronegativity sib txawv ntawm sodium thiab iodide ua rau lawv cov nyiaj ionic. Ionic compounds tsim qhov hu ua crystal lattice qauv