Information

Bromine (Br) properties


Atomic mass, symbol and atomic number

bromine is a naturally occurring element with the element symbol Br and atomic number 35. In the periodic table it stands with an atomic mass of 79.904 u in the 7th main group. The chemical element discovered by Antoine Balard in 1826 is not radioactive and is in a liquid state at room temperature.

Wanted: Bromine

General
Chemical element:Bromine
Symbol:br
Atomic number:35
Group:halogen group
Period:4
Block:p-block
Series:halogens
Appearance:brownish-red
explorers:Antoine-Jérôme Balard
Year of discovery:1826
Atomic properties
Atomic mass:79,904 u
Atomic radius:115 pm
Covalent radius:120 pm
Van der Waals radius:185 pm
Electron configuration:Ar 3d10 4s2 4p5
ionization:1139.9 kJ / mol
Physical Properties
Physical state:liquid
Density:???
Crystal structure:orthorhombisch
Magnetism:diamagnetic
molar volume:19,78 · 10-6 m3/ mol
Mohs hardness:/
Melting point:-7.3 ° C
Boiling point:58.5 ° C
Heat of fusion:5.8 kJ / mol
Heat of vaporization:30 kJ / mol
Thermal conductivity:0.12 W
Chemical properties
electronegativity:2,96

Did you know that ...

  • are the largest bromine occurrences dissolved in the sea?
  • Mercury and bromine are the only elements that are in a liquid state at room temperature?
  • Potassium bromide was the first drug for epileptic seizures?
  • elemental bromine is toxic, corrosive and dangerous to the environment?