Nomenclature of a cyclic ketone
The 1-specification for the ketone function is superfluous, there is no information obscured by omitting the '1'.  It is the most important functional group in molecule, and therefore establishes the 1-position.

Also, cyclopentone is not a proper name.  You are missing the 'ane' suffix to indicate saturation.  It would be a cyclopentanone.

Final name:

2-fluorocyclopentanone.