Answer :
The chemical symbol of the cation is [tex]ClO_{3} ^+[/tex]
There are no lone pairs around the central a tom
The ideal bond angle is 120 degrees
The actual bond angle is the same as the ideal bond angle
What is the bond angle?
The bond angle has to do with the dihedral angle that is found to exist when we have two atoms that are held together by a bond to a common central atom in a molecule.
There are no lone pairs on the central chlorine atom of the chlorotrioxyl cation as we can see in the image that is attached hence the structure is having three electron domains on the central chlorine atom and does have a trigonal planar geometry.
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