Krypton

Elizabeth Franko & Wade Weber Gaseous krypton is colorless, while solid krypton is white. Krypton is located in period 4 and group number 18. Krypton is also a gas at room temperature. Physical Properties: Noble Gas Atomic #: 36 Atomic Mass: 83.80 Boiling Point:-153.22 Celsius Melting Point:-157.36 Celsius Isotopes: 20 Known Abundance: Present in the air to the extent of about 1ppm Colorless **  Is krypton dangerous? Krypton is a gas that is found in small amounts in the earth's atmosphere. Krypton's atomic structure is very stable. It has just enough electrons to fill its outer 'shell', so it doesn't tend to combine with other elements. Since it doesn't combine with other elements, it doesn't take part in chemical reactions, so it will not burn, cause corrosion, or do other chemical-like things. It is, however, possible for krypton to hurt you. If, for example, a room were to be filled with krypton, anyone entering the room would most likely asphyxiate. This isn't because the krypton is poisonous, but because of the lack of oxygen in the room. This problem, known as Oxygen Deficiency Hazard (ODH),
 *    Krypton in a discharge tube displays its green and orange spectral sign.

link to kyrpton website - [|KRYPTON INFO]

Krypton Krypton is an element denoted by the atomic symbol Kr. Its atomic number is 36 and its atomic weight is 83.80. In its natural form it is a colorless, odorless, tasteless gas. It is found in the atmosphere in small quantities (about one part per million), and trace amounts occur in minerals, mineral __springs__, and meteorites. Commercially, krypton is produced by separation from liquefied air. The gas has some 26 isotopes, of which about 20 are radioactive. Nuclear reactors produce radioactive krypton isotopes as by-products of power generation. These isotopes can also be created by nuclear particle accelerators.

**The discovery of krypton **
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 * [[image:http://nautilus.fis.uc.pt/st2.5/bitmaps/resumo-e/r036.jpg align="left"]] || Krypton was discovered in May 1898, in the residues resulting from of the evaporation of great amounts of liquid air used to prepare argon. In fact, this element was discovered by chance, when Ramsay and Travers decided to do a fractional distillation of liquid air when trying to isolate the neon, unknown at that time. They centered their attention in the heaviest fraction and, purifying it of possible nitrogen sludge and oxygen that could still exist, observed its spectrum. They were extremely surprised with a bright yellow line, that did not belong to the helium or to the sodium, revealing the presence of an unknown gas. This new gas was denominated krypton, from the Greek word "hidden" due to the circumstances of discovery.


 * **Abundance of Krypton:**
 * **Earth's Crust**/p.p.m.: 0.00001
 * **Seawater**/p.p.m.: 0.00008
 * **Atmosphere**/p.p.m.: 1.14
 * **Sun** (Relative to H=1E12): N/A
 * **Sources of Krypton:**Forms 1 millionth of the atmosphere. Obtained from production of liquid air. Around 8 tons of krypton is produced each year world wide.
 * **Uses of Krypton:**Used in fluorescent bulbs, flashbulbs, UV lasers and as a wavelength standard.
 * **Additional Notes:**Although krypton is a harmless gas, it could asphyxiate if it excluded oxygen from the lungs.

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Krypton cost about $30 per gram. So with $100 dollars you can but about 3 1/3 grams of krypton. ||