* Structure: Chlorine gas consists of two chlorine atoms bonded together. This creates a symmetrical linear molecule.

* Electronegativity: Chlorine atoms have the same electronegativity. This means they pull on shared electrons with equal force.

* Dipole Moment: Because the electron distribution is symmetrical, there is no net separation of charge, and the molecule has no dipole moment.

In summary, the symmetrical structure and equal electronegativity of chlorine atoms in Cl₂ result in a nonpolar molecule.