35Br79.904
Bromine
HalogensVery reactive non-metals with seven outer electrons. They form salts with metals.
[Ar] 3d¹⁰ 4s² 4p⁵
- Atomic number
- 35
- Atomic mass
- 79.904
- Protons
- 35
- Neutrons
- 45 (most common)
- Electrons
- 35
- Shells
- 2, 8, 18, 7
- State at 25 °C
- Liquid
- Position
- Group 17, period 4
Proton (+)Neutron (0)Electron (−)
Discovered byAntoine-Jérôme Balard, 1826Antoine-Jérôme Balard: 1 element
Balard found it in seawater salt. Its name comes from the Greek bromos, meaning stench, because of its sharp smell.
Did you know?
- It is the only non-metal that is liquid at room temperature.
- Liquid bromine is dark red-brown.
Where it's found
- Seawater
- Salt lakes like the Dead Sea
What it's used for
- Flame retardants
- Pool and spa disinfectants
- Old photographic film
Try it
There's no safe home experiment for Bromine. Explore it with the animated atom above instead.