Helium

Helium (2) (GASEOUS)
Atomic radius:.49Deg.A (Quantum mech. value for a free atom)
Atomic volume:
Atomic weight:4.0026 (Based on Carbon 12)
Boiling point:4.215Deg. Kelvin
Covalent radius:.93Deg.A
Crystal structure:Hexagonal
Density:.1787 g/l at 273Deg. Kelvin at 1 Atm.
Electrical conductivity:
Electron configuration:1s(2)
Electronegativity:
First ionization potential:24.587 (Pauling's)
Heat of fusion:
Heat of vaporization:.0845, kJ/mol at boiling point
Melting point:.95Deg. Kelvin
Oxidation states:None
Specific heat capacity:5.193, Jg(x.1) K(x.1) at 300Deg. Kelvin
Thermal conductivity:.00152, W cm(x.1) K(x.1) at 300Deg. Kelvin
Description:A light,colorless,nonflammable gaseous element found especially in
natural gases and used chiefly for inflating balloons,airships etc.,and for
filling incandescent lamps and cryogenic research.

Comments

Popular posts from this blog

BOTTOM LIVE script

Evidence supporting quantum information processing in animals

ARMIES OF CHAOS