The Helium (periodic element N°2) • Shortlink
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Last updated by Mattia Cola - Mar, 26/02/2013 - 19:29HELIUM
(from Greek "Helios", the Sun)
SYMBOL: He
ATOMIC NUMBER: 2
MOLAR MASS (g\mol): 4,00
NORMAL STATE: gaseous
DENSITY (g*cm-3): 0,12
MELTING POINT (°C): -
BOILING POINT (°C): -269
IONIZATION ENERGY (kj\mol): 2370; 5250
ELECTRON AFFINITY (Kj\mol): <0
ELECTRONEGATIVITY: -
MAIN OXIDATION NUMBERS: 0
ATOMIC RADIUS (pm): 128
IONIC RADIUS (pm): -
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