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Explain why PCl(5) is trigonal bipyramid...

Explain why `PCl_(5)` is trigonal bipyramidal whereas `IF_(5)` is square pyramidal ?

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To explain why \( PCl_5 \) is trigonal bipyramidal while \( IF_5 \) is square pyramidal, we can use the Valence Shell Electron Pair Repulsion (VSEPR) theory. Here’s a step-by-step breakdown of the explanation: ### Step 1: Determine the Valence Electrons - **For \( PCl_5 \)**: Phosphorus (P) has 5 valence electrons. Each chlorine (Cl) contributes 1 valence electron, and there are 5 chlorine atoms. Therefore, the total number of valence electrons is: \[ 5 + (5 \times 1) = 10 \text{ valence electrons} \] ...
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