Xenon

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 Kaylee M & Katie K  =====

**Xenon**
Atomic number is 54 Atomic mass is 131.29 symbol: Xe ** Period # 5 Group# 18 Group Name: Noble Gas Melting Point: -111.9 °C - 161.25 °K Boiling Point: -108.1 °C - 165.05 °K Phase @ Room Temporature: Gas Number of Protons/Electrons in Xenon : 54 Number of Neutrons in Xenon : 77 Crystal Structure: Cubic Density @ 293 K: 5.8971 g/cm3 Color of Xenon : Colorless ** **Appearance:** heavy, colorless, odorless noble gas Discovered by: Sir Williams Ramsey; M.W. travers 1898 (England) Word Origin: Greek Exnon, stranger; Exnon, strange Isotpes: Natural xenon consists of a mixture of nine stable isotopes. An additional 20 unstable isotopes have been identified. This is a nonmetal element **The History**: Xenon was discovered by Sir William Ramsay and Morris Travers in 1898 in the residue left after evaporating liquid air components. Krypton and neon had been discovered by the same methods by the same workers only weeks earlier. They had to work with huge volumes of air to produce just a little xenon since it turned out that xenon is only present to the extent of about 0.087 ppm in the atmosphere. [|Xenon flash] **Facts About Xenon:** The menaing f the Greek word "xenos" means "stranger"  Flash bulb, Headlights, Neon signs, Lasers, Anesthesia and medical imaging are some objects that have Xenon.
 * Atomic Volume (cc/mol):** 42.9
 * Covalent Radius (pm):** 131
 * Specific Heat (@20°C J/g mol):** 0.158
 * Evaporation Heat (kJ/mol):** 12.65
 * Pauling Negativity Number:** 0.0
 * First Ionizing Energy (kJ/mol):** 1170.0
 * Oxidation States:** 7
 * Lattice Structure:** Face-Centered Cubic
 * Lattice Constant (Å):** 6.200
 * Properties:** Xenon is a noble or inert gas. However, xenon and other zero valance elements do form compounds. Although xenon is not toxic, its compounds are highly toxic due to their strong oxidizing characteristics. Some xenon compounds are colored. Metallic xenon has been produced. Excited xenon in a vacuum tube glows blue. Xenon is one of the heaviest gases; one liter of xenon weighs 5.842 grams.
 * Uses:** Xenon gas is used in electron tubes, bactericidal lamps, stobe lamps, and lamps used to excite ruby lasers. Xenon is used in applications where a high molecular weight gas is needed. The perxenates are used in analytical chemistry as oxidizing agents. Xenon-133 is useful as a radioisotope.
 * Sources:** Xenon is found in the atmosphere at levels of approximately one part in twenty million. It is commercially obtained by extraction from liquid air. Xenon-133 and xenon-135 are produced by neutron irradiation in air cooled nuclear reactors.

Humans interact with Xenon everyday, believe it or not. We usualy look at it by looking at headlights from a car. Basicaly you turn on a lightswithch and look up at the light bulb and Voila! You just experience Xenon! You can also experience it by looking at this Xenon flash above.
 * How Humans interact with Xenon:**

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