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why molecule possessing regular geometry have zero dipole moment?

Dipole Moment

A dipole exists when electrons are unequally shared between the atoms of a molecule, leading to positive and negative ends.
       Molecular geometry becomes very important when dealing with a dipole. Two highly polarized bonds pointing in the opposite direction will cancel each other out, leading to a molecule such as carbon dioxide that has two highly polar bonds, but no net dipole
        Every polar molecule has a permanent dipole.
BeH2 BF3 SO2 CH4 NH3 H2O PCl5 SCl4 ClF3 XeF2 SF6
IF5 XeF4  all having regular geometrical shape and hence zero dipole moment.


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