The number of molecules having at least one lone pair on the central atom among the following is:

(Enter the integer answer)

Question

The number of molecules having at least one lone pair on the central atom among the following is:

(Enter the integer answer)

Canvas Classes · Accepted Answer

🧠 The Lone Pair Audit
A lone pair is the "empty seat" in the valence shell that isn't occupied by a bonding partner. For central atoms, lone pairs dictate the molecular geometry via VSEPR theory. Your task: count the valence electrons, subtract the bonding electrons, and see who has a leftover pair.

🗺️ Strategic Roadmap
Step 1: Identify the "Clean" Molecules (0 LP).
- : Boron has 3 electrons, uses 3. (0 LP)
- : Phosphorus has 5, uses 5. (0 LP)
- : Sulfur has 6, uses 6. (0 LP)

Step 2: Identif

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