Krypton
Atomic Number: 36
Symbol: Kr
Atomic Weight: 83.80
Discovery: Sir William Ramsey, M.W. Travers, 1898 (Great Britain)
Electron Configuration: [Ar] 4s2 3d10 4p6
Word Origin: Greek kryptos: hidden
Isotopes: There are 23 known isotopes of krypton, 6 stable and 17 unstable. Natural krypton contains the 6 stable isotopes.
Element Classification: Inert Gas
Density (g/cc): 2.155 (@ -153°C)
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: 2
Lattice Structure: Face-Centered Cubic
Lattice Constant (Å): 5.720
References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001), Lange's Handbook of Chemistry (1952), CRC Handbook of Chemistry & Physics (18th Ed.)
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