Which one of the following is NOT an example of an expanded octate?

Step-by-step solution

In PCl ₅ , the central atom phosphorus forms 5 single bonds, having 10 valence electrons around it, which is an expanded octet. In H ₂ SO ₄ , the central atom sulfur forms 6 bonds ( 2 double bonds and 2 single bonds), having 12 valence electrons around it, which is an expanded octet. In SF ₆ , the central atom sulfur forms 6 single bonds, having 12 valence electrons around it, which is an expanded octet. In CH ₄ , the central atom carbon forms 4 single bonds, having exactly 8 valence electrons around it. Carbon bel