BROMINE

Atomic Number: 35
Mass Number: 79.904
Electron Configuration: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵
Melting Point: -7^oC
First Ionization Energy: 1140 kJ/mol
Electronegativity: 3.0
Atomic Radius: 114 pm