Question

The total number of P–O–P bridge(s) in the solid state structure of P$_4$O$_8$ is _ _ _. (answer in integer)

Hint:

In phosphorus oxides, bridging oxygens connect two P atoms (P–O–P), while terminal oxygens form P=O bonds

Answer 1

Correct Answer: 4

Step 1: Understand the structure of P$_4$O$_8$.
P$_4$O$_8$ is derived from the P$_4$ tetrahedral structureEach phosphorus atom is bonded to oxygen atoms

Step 2: Types of oxygen atoms present.
There are two types of oxygen atoms:
- Terminal oxygen atoms (P=O)
- Bridging oxygen atoms (P–O–P)

Step 3: Count total oxygen atoms.
\[ \text{Total oxygen atoms} = 8 \]

Step 4: Count terminal oxygen atoms.
In P$_4$O$_8$, each phosphorus has one terminal oxygenThus, terminal oxygen atoms = 4

Step 5: Determine bridging oxygen atoms.
\[ \text{Bridging oxygen atoms} = 8 - 4 = 4 \]
Each bridging oxygen forms one P–O–P bridge

Step 6: Conclusion.
\[ \boxed{4} \]