Br
Bromine Symbol (Br)
Bromine is element 35 of the periodic table. Copy its symbol Br and see its atomic weight, electron configuration and common compounds.
What does Br mean?
Br is the chemical symbol for bromine, element number 35 in the periodic table. Bromine is a halogen in group 17, period 4. It is a red-brown halogen and, with mercury, one of only two elements that are liquid at room temperature.
Codes and properties
| Chemical symbol | Br |
|---|---|
| Atomic number (Z) | 35 |
| Atomic weight (PubChem) | 79.90 |
| Group / period | 17 / 4 |
| Element category | halogen |
| Electron configuration | [Ar]4s² 3d¹⁰ 4p⁵ |
| State at 20 °C | Liquid |
| Oxidation states | +5, +1, -1 |
| Electronegativity (Pauling) | 2.96 |
| Melting point | 265.95 K (-7.20 °C) |
| Boiling point | 331.95 K (58.80 °C) |
| Density | 3.11 g/cm³ |
| Discovered | 1826 |
| Common compounds | NaBr, HBr, Br₂ |
How to type Br
- Plain text: type
Br— element symbols are ordinary Latin letters, with the first letter capitalised and the second lowercase. - Subscripts in formulas: use Unicode subscript digits (₀₁₂₃₄₅₆₇₈₉) for formulas such as NaBr — copy them from the chemistry keyboard.
- LaTeX: write
\mathrm{Br}in math mode, or use the mhchem package:\ce{Br}. - HTML:
Br; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for bromine?
The chemical symbol for bromine is Br.
What is the atomic number of bromine?
Bromine has atomic number 35, meaning each atom has 35 protons.
What is the electron configuration of bromine?
The ground-state electron configuration of bromine is [Ar]4s² 3d¹⁰ 4p⁵.
Related symbols
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Reference: Bromine on PubChem (NIH)