Bromine · Br Bromine
is a liquid non-metallic material at room temperature, used for research on bromine-containing compounds and flame retardant materials.
- atomic number / Atomic number
- 35
- atomic weight / Atomic mass
- 79.90 u
- Family/Group
- 17
- Period · Block / Period · Block
- 4 · p
- Category / Category
- Halogen The · Halogen
- State / State
- liquid
- Electron configuration
- [Ar]4s2 3d10 4p5
- Oxidation states / Oxidation states
- +5, +1, -1
- Electronegativity / Electronegativity
- 2.96（Pauling）
- Density / Density
- 3.11 g/cm³
- Melting point / Melting point
- 265.95 K
- Boiling point / Boiling point
- 331.95 K
- Atomic radius / Atomic radius
- 183 pm（van der Waals）
- First ionization energy
- 11.814 eV
- Discovery year / Discovery
- 1826
attribute description and data source
properties taken from PubChem periodic table snapshot (2026-10-04). Atomic weights may be reference values or representative isotope masses and cannot be considered exact constants for all samples; density, phase transition points, and phase states depend on temperature, pressure, and allotropes. The solidification of helium requires pressure. Some properties of radioactive and superheavy elements are predicted values, and missing items are marked as not included. Please check the original source and experimental conditions for precise calculations.