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Helium

He

Atomic Number:2
Atomic Weight:4
State at STP:gas PreviousHydrogen
Density:0.18 g/cc
Melting Point:-272 °C Next Beryllium
Boiling Point:-269 °C
% of Earth's Crust:
Year Discovered:1895
Electron Configuration:1s2
Ionization Energy:24.59 (eV)
Heat of Fusion:0.02 kilojoules/mole
Atomic Volume:31.8 cubic centimeters/mole
Specific Heat Capacity:5.19 Joules/gram/degree Kelvin
Radio Active:No
Wikipedia Article:en.wikipedia.org/wiki/Helium

        
 
POSTED: Dec:31:69 :
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