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: Oxygen types in P$_4$O$_8$.
There are terminal P to O oxygens and bridging P to O to P oxygens.

Step 2: Split the eight oxygens.
Four oxygens are terminal, one on each phosphorus, leaving four bridging oxygens.

Step 3: Count the bridges.
Each bridging oxygen makes one P to O to P bridge, so there are four bridges.

Step 4: Answer.
\[ \boxed{4} \]