Group+18Hr2

= __Group 18 - The Noble Gases__ =

__Common Properties Among Noble Gases__
 * low reactivity
 * complete valence shell
 * high ionization energy
 * low electronegatives
 * low boiling point
 * colorless
 * odorless
 * tasteless
 * atomic radii increase when descending the group

The Noble Gases consist of: Helium Neon Argon Krypton Xenon Radon

**Name:** Helium---Neon-- Argon-- KryptonXenonRadon **Symbol:** He--Ne-- ArKrXe--Rn **Isotopes**: 23-6---1521-7 
 * Atomic Number: **  2-10---18 36-54--86
 * Atomic Mass: **  4.002602 amu -20.1797---39.948--83.8-131.29222.0
 * Number of Protons/Electrons: **  2 -1018-3654---86
 * Number of Neutrons: **  2-1022-4877--136

l=0 ml=0 ms= +1/2 ||  ||   ||   || l=1 ml=1 ms=+1/2 ||  ||   ||   || l=1 ml=1 ms=+1/2 ||  ||   ||   || l=1 ml=1 ms=+1/2 ||  ||   ||   || l=1 ml=1 ms=+1/2 ||  ||   ||   || l=1 ml=1 ms=+1/2 ||  ||   ||   ||
 * Element || Electron Configuration || Quantum Numbers ||  ||   ||   ||
 * Helium || 1s2 || n=1
 * Neon || 1s2 2s2 2p6 || n=2
 * Argon || 1s2 2s2 2p6 3s2 3p6 || n=3
 * Krypton || 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 || n=4
 * Xenon || 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 || n=5
 * Radon || 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 || n=6

=Fun Facts:= 1. Helium
 * Discovered by Sir William Ramsay in 1895.
 * Comes from the Greek word helios, which means sun
 * used in balloons and deep sea diving
 * found in natural gas deposits, air

==

 2. Neon
 * Also discovered by Sir William Ramsay, but in 1898
 * Comes from the Greek word neos, which means new
 * used in lightning
 * obtained from liquid air

3. Argon
 * Discovered by Sir William Ramsay in 1894
 * Comes from the Greek word argon, which means inactive
 * used in lightning
 * found in the air

4. Krypton
 * Discovered by Sir William Ramsay in 1898.
 * Comes from the Greek word kryptos, which means hidden
 * used in lightning
 * comes from production of liquid air

5. Xenon 6. Radon
 * Discovered by Sir William Ramsay in 1898.
 * Comes from the Greek word xenon, which means stranger
 * used in powerful lamps and bubble chambers
 * obtained from liquid air
 * Discovered by Fredrich Ernst Dorn in 1898.
 * Comes from the word radium
 * used in the treatment in cancer
 * comes from the decay in radium

@http://chemistry.about.com/od/elementgroups/a/noblegases.htm @http://www.chemicalelements.com/groups/noblegases.html http://www.balloonbrites.com/images/home_balloons.jpg http://popartmachine.com/machine/daily/12-22-2008/neon-sign-pop-art/neon-sign-pop-art.jpg http://blogtalk.vo.llnwd.net/o23/picts/hostpics/82028bb4-841f-4ea6-9b31-f03aa5cfe2e0argon1.jpg http://www.daviddarling.info/images/krypton.jpg http://www.rsc.org/Chemsoc/VisualElements/hires/radon_2.jpg http://www.webelements.com/_media/elements/element-pics-theo/54_Xe_2.jpg