The electron group arrangement of H₃O⁺ is tetrahedral. The molecular shape is a Trigonal pyramid, and the bond angle is 107°.
The electron group arrangement is the arrangement of the atoms with other atoms. The shape is designed according to the arrangement of the atoms. They are of different types.
H - O - H bond in hydronium cation is 107° bond angle. Here the shape is a trigonal pyramid. It has 8 valence electrons.
Thus, the electron group arrangement of H₃O⁺ is tetrahedral. The molecular shape is a Trigonal pyramid, and the bond angle is 107°.
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