Symbol: Kr
Atomic Number: 36
Atomic Weight: 83.8
Element Classification: Inert Gas
Discovered By: Sir William Ramsey, M.W. Travers
Discovery Date: 1898 (Great Britain)
Name Origin: Greek: kryptos (hidden).
Density (g/cc): 2.155 (@ -153°C)
Melting Point (K): 116.6
Boiling Point (K): 120.85
Appearance: Dense, colorless, odorless, and tasteless gas
Atomic Radius (pm): n/a
Atomic Volume (cc/mol): 32.2
Covalent Radius (pm): 112
Ionic Radius: n/a
Specific Heat (@20°C J/g mol): 0.247
Fusion Heat (kJ/mol): n/a
Evaporation Heat (kJ/mol): 9.05
Thermal Conductivity (@25°C W/m K):
Debye Temperature (K): n/a
Pauling Negativity Number: 0.0
First Ionizing Energy (kJ/mol): 1350.0
Oxidation States: 2
Electronic Configuration: [Ar] 3d¹⁰ 4s² 4p⁶
Lattice Structure: Face-Centered Cubic (FCC)
Lattice Constant (Å): 5.720
Lattice C/A Ratio: n/a