The bond between two chlorine (Cl) atoms in a diatomic chlorine molecule (Cl2) is non-polar. This is because both atoms in the bond are identical, sharing the electrons equally. Since there is no difference in electronegativity between the two chlorine atoms, the electron distribution around the bond remains symmetrical.
Now, considering the geometry of the Cl2 molecule, it is linear as there are only two atoms. In a linear molecule like this, even if there were some slight difference in electronegativity (which there is not in this case), the dipoles would cancel each other out due to the symmetrical arrangement. Therefore, the entire molecule is also non-polar.
In summary, both the Cl-Cl bond and the Cl2 molecule as a whole exhibit non-polar characteristics due to the equal sharing of electrons and symmetric geometry.