 | Selenium | Atomic Number: 34 |
- Overview
Property Value Units 78.96
4.819
- Thermal Properties
Thermal Properties
Property Value Units 217°C
685°C
27.2 MPa
1766°C
5.4 kJ/mol
26 kJ/mol
321.2 J/kg·K
0.52 W/m·K
- Electon Configuration
[Ar] 3d10 4s2 4p4
K L M N O P Q 2 8 18 6 0 0 0 Level S Orbital P Orbital D Orbital F Orbital Level 1 Level 2 - History
Year Discovered
1817
- Isotopes
Isotope Common Name Symbol Mass Status Abundance Half-life Decay mode Decay Energy Nuclear Spin Magnetic Moment 34
Se
74
Selenium Se 74 Stable 0.89 - - - - - 34
Se
76
Selenium Se 76 Stable 9.37 - - - - - 34
Se
77
Selenium Se 77 Stable 7.63 - - - - - 34
Se
78
Selenium Se 78 Stable 23.77 - - - - - 34
Se
80
Selenium Se 80 Stable 49.61 - - - - - 34
Se
82
Selenium Se 82 Stable 8.73 - - - - - Isotopic mass data for stable isotopes is from:
G. Audi, A.H. Wapstra in Nuclear Physics A, 1993, 565, 1-65
and
G. Audi, A.H.Wapstra in Nuclear Physics A, 1995, 595 409-480.Natural abundance data is from:
K.J.R. Rosman, P.D.P. Taylor in Pure Appplied Chemistry, 1999, 71, 1593-1607.- Occurance
In the Universe 0.000003% In the Sun 0% In Meteorites 0.0013% In the Earth's Crust 0.000005% In Seawater 0.000000045% In the Human Body 0.000005% - Models
Pictures, videos and 3D models of the element
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