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Practice question

Question

Which of the following ions achieves a stable octet configuration by gaining one electron?

Options

Choose one · Correct answer highlighted

Explanation

Chlorine ( Cl, 3s² 3p⁵ ) has 7 valence electrons. Gaining one electron forms Cl^- ( 3s² 3p⁶ ), achieving an octet like argon. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

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