Practice question

MCQ

Question

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

Options

Choose one · Correct answer highlighted

Cl Correct Na Mg S

Explanation

Chlorine (Cl) has 7 valence electrons ( [Ne] 3s² 3p⁵ ). Gaining one electron forms Cl⁻ with a noble gas configuration ( [Ar] ).

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