Which of these molecules has an atom with an expanded octet? A) HCl B) AsCl₅ C) ICl D) NCl₃ E) Cl₂

Name: Which of these molecules has an atom with an expanded octet? A) HCl B) AsCl 5 C) ICl D) NCl 3 E) Cl 2
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Question

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The molecule AsCl₅ (arsenic pentachloride) has an expanded octet on the central arsenic atom, which has 10 valence electrons participating in bonding. This is beyond the usual octet rule and violates the traditional Lewis structure guidelines.

Which of These Molecules Has an Atom with an Expanded