Symbol: Br
Atomic Number: 35
Atomic Weight: 79.904
Element Classification: Halogen
Discovered By: Antoine J. Balard
Discovery Date: 1826 (France)
Name Origin: Greek: bromos (stench).
Density (g/cc): 3.12
Melting Point (K): 265.9
Boiling Point (K): 331.9
Appearance: Reddish-brown liquid
Atomic Radius (pm): n/a
Atomic Volume (cc/mol): 23.5
Covalent Radius (pm): 114
Ionic Radius: 47 (+5e) 196 (-1e)
Specific Heat (@20°C J/g mol): 0.473 (Br-Br)
Fusion Heat (kJ/mol): 10.57 (Br-Br)
Evaporation Heat (kJ/mol): 29.56 (Br-Br)
Thermal Conductivity (@25°C W/m K):
Debye Temperature (K): n/a
Pauling Negativity Number: 2.96
First Ionizing Energy (kJ/mol): 1142.0
Oxidation States: 7, 5, 3, 1, -1
Electronic Configuration: [Ar] 3d¹⁰ 4s² 4p⁵
Lattice Structure: Orthorhombic (ORC)
Lattice Constant (Å): 6.670
Lattice C/A Ratio: n/a