O₂

Elements

Helium

gas

(He) Helium is an atomically lightweight, chemical Gas.

Unbreathable

Properties

7
Specific heat
0.14 DTU/g/°C
Thermal conductivity
0.236 DTU/m/s/°C
Molar mass
4 g/mol
Cooling transition
-268.9 °C
Toxicity
0
Radiation absorption
9%
Light absorption
10%

Phase changes

Selected temperature

20 °C

-273.2 °C50 °C

Within phase boundaries

Cooling

Phase atlas

Forms from

1
Helium
Heating

-268.9 °C

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