Practice question
Question
Which of the following ions achieves a stable octet configuration by gaining one electron?
Explanation
Chlorine ( Cl, 3s² 3pⵠ) has 7 valence electrons. Gaining one electron forms Cl^- ( 3s² 3pⶠ), achieving an octet like argon. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Discussion
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