The number of lone pairs and the number of S—S bonds in molecules are respectively: — p Block Elements Chemistry Question

💡 Solution & Explanation

# Structure of $S_8$ Molecule **Step 1: Determine the geometry of $S_8$** $S_8$ exists as a crown or puckered ring structure with 8 sulfur atoms arranged in a cyclic pattern (not planar). **Step 2: Count S—S bonds** In a ring of 8 sulfur atoms, each sulfur is bonded to exactly 2 other sulfur atoms: $$\text{Number of S—S bonds} = 8$$ (Each atom contributes 2 bonds; total = $\frac{8 \times 2}{2} = 8$ bonds) **Step 3: Count lone pairs on each sulfur** Each sulfur atom has 6 valence electrons. - 2 electrons are used in bonds with neighboring sulfurs - Remaining electrons: $6 - 2 = 4$ electrons = **2 lone pairs per sulfur** **Step 4: Calculate total lone pairs** $$\text{Total lone pairs} = 8 \text{ atoms} \times 2 \text{ lone pairs/atom} = 16 \text{ lone pairs}$$ **Answer: 16 lone pairs and 8 S—S bonds** (Option B)