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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?
