Which of the following has a square pyramidal shape?(A) XeO{F_4} (B) Xe{O_3}{F_2} (C) XeO{F_2} (D) Xe{O_2}{F_2}

To determine which of the given molecules has a square pyramidal shape, we need to consider their molecular geometries. Square pyramidal geometry is a type of molecular geometry where there is a central atom bonded to four other atoms and one lone pair of electrons. The four atoms bonded to the central atom are located at the corners of a square base, and the lone pair occupies the apex position.

Let's analyze each of the given options:

(A) XeO{F_4}: In this molecule, xenon (Xe) is bonded to four fluorine (F) atoms and has one lone pair of electrons. The arrangement of the fluorine atoms and lone pair around xenon is square pyramidal.

(B) Xe{O_3}{F_2}: In this molecule, xenon (Xe) is bonded to two oxygen (O) atoms and two fluorine (F) atoms. It does not have a square pyramidal geometry as there are only two fluorine atoms, and the lone pair is not at the apex position.

(C) XeO{F_2}: In this molecule, xenon (Xe) is bonded to two oxygen (O) atoms and two fluorine (F) atoms. It does not have a square pyramidal geometry as there are only two fluorine atoms, and the lone pair is not at the apex position.

(D) Xe{O_2}{F_2}: In this molecule, xenon (Xe) is bonded to two oxygen (O) atoms and two fluorine (F) atoms. It does not have a square pyramidal geometry as there are only two fluorine atoms, and the lone pair is not at the apex position.

So, the molecule with a square pyramidal shape is option (A) XeO{F_4}.