Problem: What is the hybridization of the central atom in each of the following?c. PO43−

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Hybridization - depends on # of electron groups around central atom

P (less electronegative than O) → central atom

Total number of valence electrons:

            Group            Valence Electrons

P        5A                  1 × 5 e = 5 e

O        6A                 4 × 6 e = 24 e

From -3 charge               Add3 e

Total:  32 valence e

Lewis structure: 

Orbitals that can be used by the central atom:

Subshell                   Total # of orbitals 

        s           _                1 orbital  

        p          _ _ _             3 orbitals

        d        _ _ _ _ _          5 orbitals

 There are 4 groups around central element:

▪ 4 O atoms + 0 lone pairs = 4 groups (needs 4 orbitals)

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Problem Details

What is the hybridization of the central atom in each of the following?

c. PO43−

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