over and above 820 us now , page-15

>>what about helium?

http://au.youtube.com/watch?v=a8FJEiI5e6Q

http://en.wikipedia.org/wiki/Helium

Helium (He) is a colorless, odorless, tasteless, non-toxic, inert monatomic chemical element that heads the noble gas group in the periodic table and whose atomic number is 2. Its boiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions...