Element Name: Selenium
Atomic No.: 34
State (298 K): solid
Uses: semiconductors, photovoltaics & solar cells
Atomic Mass: 78.96 g/mol
Density: 4.79 g/cm
3
B.P.: 958 K
F.P.: 490 K
Electronic Configuration: 1s
2
2s
2
2p
6
3s
2
3p
6
3d
10
4s
2
4p
4
Isotopes:
74
Se 73.9225 amu (0.9%)
76
Se 75.9192 amu (9.0%)
77
Se 76.9199 amu (7.6%)
p;
78
Se 77.9173 amu (23.5%)
80
Se 79.9165 amu (49.6%)
82
Se 81.9167 amu (9.4%)
Electronegativity: 2.55
Radius: 117 pm (covalent)
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