Helium-Darian

Inside Helium:
 * HELIUM **

a video from you tube about helium:

media type="youtube" key="a8FJEiI5e6Q" height="385" width="480" align="center"


 * Name:** Helium


 * Symbol:** He


 * Type:** Noble Gas


 * Atomic number:** 2


 * Atomic weight:** 4.00260


 * Density at 293k:** 0.0001787 g/cm3


 * Atomic volume:** 27.2 cm3/mol


 * Discovered by:** Pierre Janssen & Norman Lockyear


 * State:** gas


 * Melting Point:** 0.95 k (272.2 ° c)


 * Metal or Non Metal**: Non Metal

(taken from: http://wordnetweb.princeton.edu/perl/webwn?s=helium)
 * Definition:** [|S:] (n) **helium**, [|He], [|atomic number 2] (a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)

**History:** In 1869, Dmitri Mendeleev discovered the patterns of the periodic table, which makes chemists and him self easier to predict the missing parts of elements in the periodic table.

In 1859 Gustav Kirchoff built an improved spectroscope. Since then astronomers mount spectroscopes on their telescopes.

Spectroscope: An instrument for producing and observing spectra. (taken from:http://www.thefreedictionary.com/spectroscope)

During the total solar eclipse in 1868, a French scientist named Pierre Janssen, observed the spectrum of the Sun's chromosphere from India. Janssen saw a bright yellow spectral line and he thought that thing was a well-known element, sodium. But when he observed into it more deeply, he saw something different, so he decided to continue studying about the strange line. About the same time, Norman Lockyear, a British scientist, independently observed this line too. Detailed studies proofs that this line was different from sodium.

At last Janssen and Norman discovered a whole new element. They gave a name for it: Helium. Helium was taken from a Greek word "helios" meaning "sun". Sir William Ramsay finally isolated helium in a laboratory in 1895. He heated a uranium-containing mineral, Norwegian cleveite, then he got: helium. Mendeleev did not predict the existence of helium and other noble gasses with his periodic table because he originally based it on atomic weight rather than atomic number. The discovery of Helium was important and it goes to the periodic table labeled as element number 2.

chromosphere (a gaseous layer of the sun's atmosphere (extending from the photosphere to the corona) that is visible during a total eclipse of the sun) (taken from: http://wordnetweb.princeton.edu/perl/webwn?s=chromosphere)

FUN FACTZ!!! = = taken from: http://hubpages.com/hub/Fun-Facts-About-Helium WOW!!!
 * -it was thought to be a medal
 * -one quarter of the universe is made up of helium atoms
 * -helium is used to treat asthma
 * -helium is an important element
 * -it is formed underground
 * -most abundant element
 * -reserves have been built up for billions of years
 * -Helium is non-flammable
 * -it has a bright yellow spectrum
 * -it never freezes
 * -it is lighter than air
 * -lowest melting point of the elements
 * -helium doesn't burn
 * -non-toxic
 * -no helium exists in the human body
 * -the atomosphere contains around 5 parts per million-
 * -Russia could be the biggest source for Helium in the future
 * The voice of someone who has inhaled helium temporarily sounds high-pitched

USES: -Balloons (If it uses normal gas, it will not float/ fly because helium is lighter than the air) -Keep things from exploding (for example: Welders) - ......

IS IT DANGEROUS??????? No MAN!!! Just try Eating it and You'll know that it's 100% non-toxic! (see fun facts)

THANK YOU FOR READING!!!!! Article sources: http://www.chemicool.com/elements/helium.html http://astronomyhistory.suite101.com/article.cfm/discovery_of_helium_in_the_sun http://www.dbxsoftware.com/helium/images/helium-anim.gif (the moving atom thing) http://www.historyforkids.org/scienceforkids/chemistry/atoms/helium.htm (plus the other picture was from here) http://howgoodisthat.files.wordpress.com/2009/03/helium.jpg (the coloured balloon picture)