Group+18

= ​ ​NOBLE GASES = The noble gas group consists of Helium, Neon, Argon, Krypton, Xenon, and Radon.

Facts about Noble Gases:

 * Noble gases were once labeled group 0 because they were thought to have a valence of 0 which means they couldn't combine with other elements
 * Helium is the most common element in the universe after hydrogen
 * In the elements quantum numbers they all have a positive spin
 * They all end in the last box in their orbital
 * Noble gases have very low boiling and melting points
 * They are also commonly used in lighting because of their low chemical reactivity

Properties:

 * 1) odorless
 * 2) colorless
 * 3) tasteless
 * 4) monatomic gases
 * 5) very low chemical reactivity
 * 6) nonflammable

Helium
= Fun Facts: = Found in 1868 by Pierre Janssen & Norman Lockyer Can be found in the National Gas Fields of United States Uses: Inflating balloons, high speed push inside missiles, and inert gas shield for arc welding Helium glows pale peach when an electric current goes through it
 * Atomic Number - 2
 * Atomic Mass - 4 [[image:helium.jpg width="252" height="149" align="right"]]
 * Protons - 2
 * Neutrons - 2
 * Electrons - 2
 * Isotopes - 2
 * Electron Configuration - 1s²
 * Quantum Numbers -
 * n= 1
 * l= 0
 * ml= 0
 * ms= +1/2

Neon
= Fun Facts: = Discoved in 1898​ by Sir William Ramsey & Morris Travers Uses: Tv tubes and helps make gas lasers Neon is the fifth most common chemical found in the universe Neon is found in the Earth's atmosphere
 * Atomic Number - 10
 * Atomic Mass - 20
 * Protons - 10
 * Neutrons - 10
 * Electrons - 10
 * Isotopes - 3
 * Electron Configuration - 1s²2s²2p⁶
 * Quantum Numbers -
 * n= 2
 * l= 1
 * ml= 1
 * ms= +1/2

Argon[[image:argon.jpg align="right"]]
= Fun Facts: = Was thought of in 1785 by Henry Cavendish but wasn't proven until 1894 by Lord Rayleigh & Sir William Ramsey ​ Uses: in electric lights, it redues gas leakage, and it's uses in aerosol-type cans Found in the Earth's atmosphere In cryoablation they use liquefied argon to kill cancer cells
 * Atomic Number - 18
 * Atomic Mass - 40
 * Protons - 18
 * Neutrons - 22
 * Electrons - 18
 * Isotopes - 24
 * Electron Configuration - 1s²2s²2p⁶3s²3p⁶
 * Quantum Numbers -
 * n= 3
 * l= 1
 * ml= 1
 * ms= +1/2

**Krypton[[image:krypton.jpg align="right"]]**
= Fun facts: = 1898 was when Krypton was discovered by Sir William Ramsey & Morris Travers Krypton is used in expensive incandecent bulbs to filter gas It is also used in high speed photography Krypton comes from the Greek word kryptos which means hidden
 * Atomic Number - 36
 * Atomic Mass - 84
 * Protons - 36
 * Neutrons - 48
 * Electrons - 36
 * Isotopes- 32
 * Electron Configuration - 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶
 * Quantum Numbers -
 * n= 4
 * l= 1
 * ml= 1
 * ms= +1/2

Xenon[[image:xenon.jpg align="right"]]
= Fun facts: = Uses: Xenon flash lamp and contribute to modern photographic flashes Xenon comes from decaying radioactive iodine-129 Xenon is also uses in stobe lights
 * Atomic Number - 54
 * Atomic Mass - 131
 * Protons - 54
 * Neutrons - 77
 * Electrons 54
 * Isotopes - 38
 * Electron Configuration - 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶
 * Quantum Numbers -
 * n= 5
 * l= 1
 * ml= 1
 * ms= +1/2
 * Xenon was discover in 1898 by William Ramsey & Morris Travers **

= Fun facts: = Discovered in 1900 by Friedrick Ernst Dorn Unlike the other noble gases radon is radioactive Radon is formed by decaying uranium Uses: radiation therapy and it's used in few hospitals = = = = = = = Sources: =
 * Atomic Number - 86
 * Atomic Mass - 222
 * Protons - 86
 * Neutrons - 136
 * Electrons - 86
 * Isotopes - 34
 * Electron Configuration - 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶4f¹⁴5d¹⁰6s²6p⁶
 * Quantum Numbers -
 * n= 6
 * l= 1
 * ml= 1
 * ms= +1/2

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