The bond angle in xenon dichloride (XeCl₂) is approximately 180 degrees.
This molecule has a linear geometry due to its electron pair arrangement. Xenon (Xe) is the central atom and is bonded to two chlorine (Cl) atoms. The molecule has a total of five electron pairs surrounding the xenon atom: three lone pairs and two bonding pairs. According to the VSEPR (Valence Shell Electron Pair Repulsion) theory, the arrangement of these electron pairs will determine the geometric shape of the molecule.
In XeCl₂, the three lone pairs repel each other and occupy the equatorial positions in a trigonal bipyramidal arrangement, while the two bonding pairs of electrons are positioned opposite to each other in the axial positions. This arrangement minimizes the electron pair repulsion, resulting in a linear structure with a bond angle of 180 degrees between the two chlorine atoms.