헬륨
(He:Helium)
Symbol |
He |
Name |
Helium |
Atomic Number |
2 |
Atomic Weight |
4.0026 |
Boiling Point(°C) |
-268.9 |
Melting Point(°C) |
-272 |
Density |
0.126 |
Heat Vapor |
0.02 |
Heat Fusion |
0.005 |
Electrical Conductivity |
- - |
Thermal Conductivity |
0.0003 |
Specific Heat Capacity |
1.25 |
Electron Shell |
2 |
Orbital |
1s2 |
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