Bromine forms which ion?

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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

Bromine forms which ion?

Explanation:
Bromine tends to gain electrons to have a full outer shell. It has seven electrons in its outer level, so by gaining one more it achieves a stable octet, becoming a bromide ion with a -1 charge (Br−). This is the common ionic form you see in salts like NaBr or in solution. Losing electrons to form Br+ or existing as Br2− would be unlikely for a halogen, and a neutral bromine atom (Br0) isn’t an ion.

Bromine tends to gain electrons to have a full outer shell. It has seven electrons in its outer level, so by gaining one more it achieves a stable octet, becoming a bromide ion with a -1 charge (Br−). This is the common ionic form you see in salts like NaBr or in solution. Losing electrons to form Br+ or existing as Br2− would be unlikely for a halogen, and a neutral bromine atom (Br0) isn’t an ion.

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