Bromide ion
Charge: 1- · Type: Anion · Molar mass: 79.904 g/mol
Made of: bromine
How it forms
Like chlorine, bromine needs one electron to complete its outer shell and accepts it from metals to form Br-. Silver bromide's sensitivity to light made it the basis of photographic film for over a century.
Naming note
Br- is the bromide ion. Do not confuse bromide (the ion) with bromine (the reddish-brown element).
Examples in compounds
Sodium bromide
Silver bromide
Potassium bromide