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Bromine Br
Where is bromine used--or where does it impact our everyday lives?
Bromine is a liquid at room temperature. {Only bromine and mercury are liquids at room temperature.)
The vial on the left contains elemental bromine--a brown/orange liquid with some orange bromine vapor above the liquid.
When placed in a gas jar, more bromine vaporizes and the gas diffuses (spreads) throughout the gas jar.
Eleventh grade IB Chemistry students investigate the relative reactivity of halogens with aqueous solutions of potassium halides.
Reactions between chlorine, bromine and iodine with solutions of potassium chloride, potassium bromice and potassium iodide.
If one halogen is more reactive, the diatomic halogen will displace the less reactive halide from its salt. Here bromine (in bromine water, has displaced the less reactive iodine from potassium iodide solution. (The top, mineral oil, layer has been changed to purple, colored by free iodine, I2. Potassium bromide is the other product. 2KI + Br2 --> I2 + 2KBr)
Class of 2015 graduate and Princeton student Gabriella P used a bromine compound pyridinium perbromide to make the yellow fluorescing compound bromonitroaniline.
Photographer Gabriella P
A compound of bromine and phosphorus is used for fire fighting
Halogen is the name given to Group 17 (7) in the periodic table. Fluorine, F, chlorine, Cl, bromine, Br, iodine, I, and astatine, At are the halogen elements. Halogen light bulbs are made with iodine or bromine. The halogen vaporizes in the bulb when it heats up and the loss of tungsten atoms from the wire filament is significantly reduced when halogen atoms attach to the metal filament and most lost tungsten atoms redeposit on the filament when the bulb cools.
