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VISUAL CHEMISTRY
HELIUM
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Navigation
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Tutorials
General
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PROPERTIES |
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Relative atomic mass |
4.0026 |
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Atomic mass (kg) |
6.68
x 10-27 |
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Density (g/cm3) |
0.147 |
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Physical State at STP |
Monatomic
gas (He) |
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Melting point (°C) |
- 270 |
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Boiling point (°C) |
- 269 |
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Crystal
Structure of solid element |
Close packed hexagonal |
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Stable isotopes |
3He,
4He |
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STP =
standard temperature and pressure. Usually
considered as room temperature and
pressure. |
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