Helium

media type="custom" key="3046886" Helium: Atomic Number: 2 Atomic Mass: 4.00260 Element Symbol: He Period:1 Group: 18 Group Name: Noble Gases Classification: Non-metal Texture: It is a gas it has no texture State at Room Temp:Gas Melting Point:-272 Degerees C. Boiling Point:-268.6 Degrees C. Helium is a colorless,oderless,tasteless, non- toxic chemical element that heads the nobel gas group in the periodic table. Helium has the lowest melting of any other element and is widely used in cryogenic research because its boiling point is close to absolute zero. Also, the element is vital in the study of super conductivity. Biological Role: Helium has none Helium's Isotopes:
 * ~ [|3]He ||~ stable ||~ 1/2+ ||~ %Abundance=0.000137 3 ||
 * ~ [|4]He ||~ stable ||~ 0+ ||~ %Abundance=99.999863 3 ||
 * ~ [|5]He ||~ 0.60 MeV ||~ 3/2- ||~ %N=100 ||
 * ~ [|6]He ||~ 806.7 ms ||~ 0+ ||~ %B-=100 ||
 * ~ [|7]He ||~ 160 keV ||~ (3/2)- ||~ %N=100 ||
 * ~ [|8]He ||~ 119.0 ms ||~ 0+ ||~ %B-=100, %B-N=16 1 ||
 * ~ [|9]He ||~ 0.30 MeV ||~ (1/2-) ||~ %N=100 ||
 * ~ [|10]He ||~ 0.3 MeV ||~ 0+ ||~ %N=100 ||

The Bohr Model

History: Hellium, the lighter of the noble be discovered. In fact, this element was first identified in the Sun rather than in the Earth. In 1868, during a solar eclipse in India, a spectrometer was used for the first time in the study of the chromosphere around the Sun. The chromosphere's spectrum, among other bright stripes, contain the hydrogen characteristic stripes and a yellow one that, at the time, was thought to be corresponding to sodium. The French astronomer Janssen decided to study the origin of that stripe and tried to reproduce the chromosphere's spectrum starting from ordinary light. He succeeded his purpose proving that the yellow stripe did not belong to sodium, but was probably the stripe of a new element.

http://dsc.discovery.com/videos/mythbusters-fun-with-gas.html http://chemicalelements.com/elements/he.html We use helium to fill our ballons at our parties, for deep-sea breathing systems, lift in air ships, and for protective gas for industrial uses.