Symbol
Br
Atomic Number
35
Atomic Mass
79.904
Protons
35
Neutrons
44
Electrons
35
Type
Halogen
Isotopes
Bromine-79, Bromine-81
Discovery Year
1826
Discovered By
Antoine Jérôme Balard
Group
17
Period
4
Boiling Point
139°F
Melting Point
19.0°F
Electron Configuration
[Ar] 3d¹⁰ 4s² 4p⁵
Density (g/cm³)
3.122
Crystal Structure
Orthorhombic
Magnetism
Diamagnetic
Abundance in Earth's Crust
0.0002%
Phase at Room Temperature
Liquid