An ion of bromine with a single negative charge has the symbol and the name

br+, bromide ion
br-, bromide ion
br+, bromium ion
br-, bromium ion

Br is the symbol for the element bromine. It is found in new IUPAC group 17 of a modern periodic table. Bromine is a halogen.

To name a halogen anion with charge -1, replace the suffix "-ine" in the name of the element with the suffix "-ide." For example,

The symbol of a bromine atom is Br. The atom is neutral. However, it carries a negative charge of -1 after it gains one electrons and forms a negative ion. The charge of the bromide ion shall be written as a superscript in its symbol. The size of the charge is written in front of the sign.

The charge on the bromide ion is -1. In the superscript, omit the number 1 and write "-". Hence the symbol

.

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