2.  By: Zach  http://www.webelem ents.com/helium/ http://www.webelem ents.com/helium/

3. Helium is colorless. It’s a gas at 298k It has no hardness Its conductivity is 0.1513 W m -1 K -1 It is a non-metal. Its melting pt. is -458 °F Its boiling pt. is (- 452.07 °F

4.  Space group: Fm3-m (Space group number: 225)  Structure: ccp (cubic close-packed)  Cell parameters: ◦ a: 424.2 pm ◦ b: 424.2 pm ◦ c: 424.2 pm ◦ α: 90.000° ◦ β: 90.000° ◦ γ: 90.000°

5. The symbol for helium is He and its atomic number is 2. Its atomic weight is 4.002602 (2).

6.  Helium is a p-block  Its period in the periodic table is 1  Group name is noble-gas  Its Ground State electron configuration is 1s 2

7.  Helium can be used to fill balloons  Inert gas for arc welding  high speed push gas inside air to air missiles for guidance corrections.  rare document preservation  nuclear detonation simulations

8.  A gas for supersonic wind tunnels  Neon Lasers  helium filled border patrol "AEROSTAT”  It’s used in oxygen tanks for divers

9.  There is very little helium left on earth but what is left is found in the atmosphere, and radio active decay.  In the universe there is 230000000 pounds ppb left.

10.  Helium doesn’t react with anything.  It has a oxidation state of 0

11. http://www.youtube.com/ watch?v=FbzXXpsmfWY