KRYPTON

=Krypton =

It is a colorless, odorless, and tasteless gas. Krypton is unreactive. Krypton is used in lightning products like lamps. The word "krypton" comes from the Greek origin "kryptos" meaning "hidden." Edited by Julianna R.
 * Symbol**:Kr
 * Atomic Number:** 36
 * Protons**: 36
 * Electrons**: 36
 * Neutrons**: 48
 * Average Atomic Mass**: 83.798
 * Discovery**: This element was discovered in 1898 by Sir William Ramsay and his student Morris W. Travers.
 * Uses**: Krypton is used in photography as a white light source. It is used in photographic flashes during high speed photography. Krypton gas is used to make luminous signs. It is also used in combination with argon in fluorescent lights as gas. It is also used in colored gas discharge tubes. It is widely used in krypton fluoride laser. Liquid krypton is used in experimental particle physics.
 * Interesting Facts:**


 * by james**
 * Discovery:** Sir William Ramsey, M.W. Travers, 1898 (Great Britian)
 * Electron Configuration:** [Ar] 4s2 3d10 4p6
 * Word Origin:** Greek //kryptos//: hidden
 * Isotopes:** There are 30 known isotopes of krypton ranging from Kr-69 to Kr-100. There are 6 stable isotopes: Kr-78 (0.35% abundance), Kr-80 (2.28% abundance), Kr-82 (11.58% abundance), Kr-83 (11.49% abundance), Kr-84 (57.00% abundance), and Kr-86 (17.30% abundance).
 * Element Classification:** Inert Gas
 * Density:** 3.09 g/cm3 (@4K - solid phase)

2.155 g/mL (@-153°C - liquid phase)

3.425 g/L (@25°C and 1 atm - gas phase) by james
 * Melting Point (K):** 116.6
 * Boiling Point (K):** 120.85
 * Appearance:** dense, colorless, odorless, tasteless gas
 * Atomic Volume (cc/mol):** 32.2
 * Covalent Radius (pm):** 112
 * Specific Heat (@20°C J/g mol):** 0.247
 * Evaporation Heat (kJ/mol):** 9.05
 * Pauling Negativity Number:** 0.0
 * First Ionizing Energy (kJ/mol):** 1350.0
 * Oxidation States:**0, 2
 * Lattice Structure:** Face-Centered Cubic
 * Lattice Constant (Å):** 5.720
 * CAS Registry Number:** 7439-90-9

by james by Andrew