What are the basic properties of Selenium?
Selenium (symbol: Se) is a nonmetal with atomic number 34. Its atomic mass is 78.971 u, and it belongs to period 4 and group 16.
Selenium (Se) Properties and Facts
Element 34 - Nonmetal
What is the electron configuration of Selenium?
The electron configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁴
What are the physical properties of Selenium?
Melting point: 494.0 K
Boiling point: 958.0 K
Density: 4.819 g/cm³
What are the known isotopes of Selenium?
- Se-74: 0.89% abundance
- Se-76: 9.37% abundance
- Se-77: 7.63% abundance
- Se-78: 23.77% abundance
- Se-80: 49.61% abundance
- Se-82: 8.73% abundance
What is the biological role and occurrence of Selenium?
Biological role: Essential trace element for humans and animals
Natural occurrence: Found in copper ores and sulfide minerals