Question

how many electrons will bromine gain or lose when it becomes an ion? loses 7 loses 1 gains 7 gains 1

Explanation:

Step1: Determine the valence electrons of bromine

Bromine is in group 17 of the periodic table. Elements in group 17 have 7 valence electrons.

Step2: Analyze the octet rule

Atoms tend to gain or lose electrons to achieve a full - outer shell (octet, 8 electrons). Since bromine has 7 valence electrons, it needs to gain 1 electron to complete its octet.

Answer:

Gains 1