An element from group 17 is the most likely to form a negative ion.
Define negative ions.
Humans inhale a lot of negative ions, which are invisible, odorless, and tasteless molecules, in some situations.
They can also generate positive ions in other scenarios because they have additional electrons in their valence shell.
However, all of the elements in group 17 have seven electrons in their valence shells, therefore one more electron is needed for them to reach the octet state.
Consequently, they gain electrons to form negative ions.
Therefore, an element from group 17 is most likely to form a negative ion.
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