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He - Helium (2/4.0026)
Material List
Currently compound materials are not available.
Naturally occurring isotopes:
4 3
Density:
0.17847E-03 (273.15K)
g/cm
3
Melting point:
-272.2
o
C
Boiling point:
-268.934
o
C
Latent heat of fusion:
5.23
J/g
Specific heat:
5.193
J/g/K (at room temp.)
Coefficient of lineal thermal expansion:
cm/cm/K (at room temp.)
Thermal conductivity:
1.52E-03
W/cm/K (at room temp.)
Electrical resistivity:
hm-cm (at room temp.)
lonization potential (1st):
24.58
eV
Electronic work function Φ:
Oxidation potentials:
V
Chemical valence:
0
Electrochemical equivalents:
g/amp-hr
lonic radius:
angstrom
Valence electron potential:
-eV
Principal quantum number:
1
Principal electron shells:
K
Electronic configuration:
1s2
Valence electrons:
1s2
Crystal form:
HCP
Half life:
Cross section σ:
0.007
barns
Vapor pressure:
Pa (at melting point)
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