Amorphous liab hmoov, ua dub ntawm sawv thiab crystalline ntawm cua sov;Cov ntaub ntawv vitreous thiab colloidal tuaj yeem npaj tau.
Amorphous daim ntawv softens ntawm 40 ° C thiab melts ntawm 217 ° C.Nws tsis tshua muaj tshwm sim nyob rau hauv nws lub xeev elemental nyob rau hauv cov xwm, los yog raws li ntshiab ore compounds.
| Cim: | Se |
| CAS | 7782-49-2 ib |
| Atomic Number: | 34 |
| Atomic Nyhav: | 78.96 ib |
| Ceev: | 4.79g/mc ib |
| Melting Point: | 217oC ua |
| Boiling Point: | 684.9c ua |
| Thermal conductivity: | 0.00519 W/cm/K @ 298.2 K |
| Hluav taws xob Resistivity: | 106 microhm-cm @ 0 oC |
| Electronegativity: | 2.4 Pauling |
| Thaum tshav kub kub tshwj xeeb: | 0.767 Cal/g/K @ 25 oC |
| Thaum tshav kub kub ntawm Vaporization: | 3.34 K-cal/gm atom ntawm 684.9 oC |
| Thaum tshav kub kub Fusion: | 1.22 cal/gm |
| Hom | Epoch-Chem |
1 Kev tsim khoom: selenium (I) chlorid, Selenium dichloride, Selenides, mercury selenide.
2 Science high technology kev lag luam: txhuas selenide, zinc selenide, tooj liab indium gallium diselenide.
3 Hluav taws xob: semiconductors, electropositive hlau, Tetraselenium tetranitride.
4 Chemistry: Selenols, selenium isotope, Yas, duab raug.
5 Kev lag luam daim ntawv thov: iav ua, selenium nruas, electrostatic duab, kho qhov muag ntsuas.
Kev pabcuam peb tuaj yeem muab tau
1) Daim ntawv cog lus raug cai tuaj yeem kos npe
2) Daim ntawv cog lus tsis pub lwm tus paub tuaj yeem kos npe
3) Xya hnub rov qab lav
Tseem ceeb dua: peb tuaj yeem muab tsis tau tsuas yog cov khoom lag luam, tab sis kev pabcuam kev daws teeb meem!
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