Qhov sib txawv tseem ceeb ntawm BeH2 thiab CaH2 qauv yog tias BeH2 muaj cov khoom siv tshuaj lom neeg thaum CaH2 muaj ionic cuam tshuam ntawm atoms.
BeH2 (beryllium hydride) thiab CaH2 (calcium hydride) yog cov tshuaj inorganic. Ob qho no yog hydride tebchaw muaj hydrogen atoms ua ke nrog beryllium thiab calcium atoms, feem. Lawv muaj cov qauv sib txawv thiab geometry vim qhov sib txawv ntawm electron ceev ntawm txhua qhov sib xyaw.
BeH2 Structure yog dab tsi?
BeH2 yog beryllium hydride. Ib qho beryllium hydride molecule muaj ib tug linear geometry vim hais tias lub beryllium atom yog ib pawg 2 atom muaj tsuas yog ob valence electrons. Ob lub tshuab hluav taws xob no ua ke nrog cov hluav taws xob tsis sib xws ntawm ob lub hydrogen atoms thaum tsim lub BeH2 molecule. Txij li thaum tsis muaj lwm daim ntawv cog lus lossis ib leeg electron khub hauv beryllium atom, cov molecule ua linear, txo qhov kev cuam tshuam tsis zoo thiab kev rov qab los ntawm ob daim ntawv cog lus Be-H.
Daim duab 01: Beryllium Hydride Structure
Txawm li cas los xij, BeH2 cov khoom yog ib qho inorganic compound, muaj cov tshuaj formula (BeH2)n. Thiab, nws tshwm sim raws li cov khoom tsis muaj xim uas yog insoluble hauv cov kuab tshuaj yog tias cov kuab tshuaj tsis tuaj yeem decompose cov khoom. Nyob rau hauv cov ntaub ntawv no, cov hydrogen atoms yog bonded rau lub beryllium atom los ntawm covalent bonding. Qhov no yog kev zam los ntawm lwm pab pawg 2 cov ntsiab lus vim tias cov tshuaj lom neeg tsim cov hydrides uas yog ionic compounds.
Thaum xav txog cov khoom BeH2, nws yog amorphous dawb khoom uas muaj cov qauv hexagonal crystalline nrog lub siab ceev. Cov qauv no tau tshaj tawm tias muaj lub cev-centred orthorhombic unit cell nyob rau hauv lub network ntawm lub ces kaum, sib koom BeH4 tetrahedra.
Txawm hais tias pawg 2 cov ntsiab lus xav tias beryllium hnov mob nrog hydrogen, beryllium qhia tsis muaj cov tshuaj tiv thaiv. Yog li ntawd, nws tsis yog yooj yim los npaj no compound. Peb tuaj yeem npaj BeH2 ntawm kev kho dimethylberyllium nrog lithium aluminium hydride. Tsis tas li ntawd, cov ntaub ntawv ntshiab BeH2 los ntawm pyrolysis ntawm di-tert-butylberyllium ntawm qhov kub siab.
CaH2 Structure yog dab tsi?
CaH2 yog calcium hydride. Nws yog ib qho ionic compound thiab alkaline ntiaj teb hydride uas muaj hydrogen atoms ua ke nrog calcium atoms. Nws zoo nkaus li cov hmoov grey-dawb uas tuaj yeem hnov mob sai sai nrog dej, muab cov pa roj hydrogen. Yog li, peb tuaj yeem siv qhov sib xyaw no feem ntau ua tus neeg ua kom qhuav rau lub hom phiaj desiccation. Peb tuaj yeem npaj CaH2 los ntawm kev kho ncaj qha ntawm calcium nrog hydrogen roj ntawm li 300 txog 400 Celsius kub.
Daim duab 02: Calcium Hydride Structure
CaH2 muaj txiaj ntsig zoo ua tus neeg sawv cev txo qis rau kev tsim cov hlau los ntawm lawv cov oxides. Cov hlau uas peb tuaj yeem tsim tau siv txoj kev no suav nrog Ti (titanium), V (Vanadium), Nb (Niobium), Ta (Tantalum), thiab U (Uranium). Tsis tas li ntawd, qhov sib xyaw no muaj txiaj ntsig zoo hauv kev tsim cov roj hydrogen. Ntawm no, CaH2 yog decomposed rau hauv Ca hlau qhov twg nws tso cov pa hydrogen. Tsis tas li ntawd, qhov sib xyaw no tuaj yeem siv los ua lub tshuab nqus dej thiab.
Qhov txawv ntawm BeH2 thiab CaH2 Structure yog dab tsi?
BeH2 thiab CaH2 yog cov tshuaj inorganic. Lawv yog cov hydrides uas muaj hydrogen atoms raws li cov khoom siv hluav taws xob. BeH2 yog beryllium hydride thaum CaH2 yog calcium hydride. Qhov sib txawv tseem ceeb ntawm BeH2 thiab CaH2 qauv yog tias BeH2 muaj cov khoom siv tshuaj lom neeg thaum CaH2 muaj ionic kev cuam tshuam ntawm atoms. Ntxiv mus, BeH2 yog covalent compound thaum CaH2 yog ib qho ionic compound.
Hauv qab no yog ib sab ntawm kev sib piv ntawm qhov sib txawv ntawm BeH2 thiab CaH2 qauv.
Summary – BeH2 vs CaH2 Structure
BeH2 yog beryllium hydride thaum CaH2 yog calcium hydride. Lawv yog cov hydrides uas muaj hydrogen atoms raws li cov khoom siv hluav taws xob. Qhov sib txawv tseem ceeb ntawm BeH2 thiab CaH2 qauv yog tias BeH2 muaj cov khoom siv tshuaj lom neeg thaum CaH2 muaj ionic kev cuam tshuam ntawm atoms.
