2) Daim ntawv cog lus tsis pub lwm tus paub tuaj yeem kos npe
3) Xya hnub rov qab lav
Tseem ceeb tshaj: peb tuaj yeem muab tsis tau tsuas yog cov khoom lag luam, tab sis kev pabcuam kev daws teeb meem!
1. Khoom npe:Selenium Se
2. Formula: Se
3. Purity: 99.9% - 99.9999%
4. CAS Nr: 7782-49-2
5. Cov tsos: hmoov los yog granules
6. Particle loj: 200 mesh, 2-5mm, thiab lwm yam
7. Hom: Epoch-Chem
Cim: | Se |
CAS | 7782-49-2 ib |
Atomic Number: | 34 |
Atomic hnyav: | 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 |