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35Br

Bromine

Halogen · 79.90 u · group 17, period 4

Bromine · Br

Identity

Atomic number35

SymbolBr

CategoryHalogen

Standard stateLiquid

Group · Period · Block17 · 4 · p

Electron configuration[Ar]4s2 3d10 4p5

Atomic

Atomic mass79.90 u

Atomic radius183 pm

Protons / Neutrons / Electrons35 / 45 / 35

Shells (e⁻ per shell)2, 8, 18, 7

Chemical

Electronegativity (Pauling)2.96

Ionization energy11.814 eV

Electron affinity3.365 eV

Oxidation states+5, +1, -1

Physical

Melting point265.9 K · -7.2 °C

Boiling point331.9 K · 58.8 °C

Density3.11 g/cm³

History

Year discovered1826

CPK color

#A62929

State at room temp (25 °C)

liquid

Position

Molecules with Br

7 in library

Hydrogen Bromide

Phosphorus tribromide

Bromine trifluoride

Bromine pentafluoride

Bromochloroacetic Acid

C₂H₂BrClO₂

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