Which is the chemical symbol for bromine gas?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

Which is the chemical symbol for bromine gas?

Explanation:
Bromine forms diatomic molecules in its elemental state, so the symbol for bromine gas is Br2, indicating two bromine atoms bonded together. The other forms represent different species: Br- is bromide ion (bromine with a negative charge in compounds), Br is just a single bromine atom (not the stable elemental gas form), and BrO- is a bromite ion (bromine with oxygen and a negative charge). So Br2 correctly represents bromine in its elemental gas form. (For context, bromine is a liquid at room temperature, but when considered as a gas it exists as Br2 in diatomic molecules.)

Bromine forms diatomic molecules in its elemental state, so the symbol for bromine gas is Br2, indicating two bromine atoms bonded together. The other forms represent different species: Br- is bromide ion (bromine with a negative charge in compounds), Br is just a single bromine atom (not the stable elemental gas form), and BrO- is a bromite ion (bromine with oxygen and a negative charge). So Br2 correctly represents bromine in its elemental gas form. (For context, bromine is a liquid at room temperature, but when considered as a gas it exists as Br2 in diatomic molecules.)

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