[Global]
Number=2
ShortName=He
CAS=7440-59-7
Name=Helium
Bloc=p
Family=Noble gas
Wikipedia=http://en.wikipedia.org/wiki/Helium

[History]
Year=1895
Discoverer=Pierre Jules Cesar Janssen, Joseph Norman Lockyer, Sir Edward Frankland
Etymology=Greek "helios" for "sun"

[Values]
MeltingPoint=0.95
BoilingPoint=4.216
Mass=4.002602
CovalentRadius=28
VanDerWaalsRadius=120
ElectronicAffinity=0
Electronegativity=-1
ElectronicConf=1s2
FirstIonistionEnergy=2372.3
SecondIonisationEnergy=5250.5
ThirdIonisationEnergy=-1