Polarisation

• Electronegativity is the ability to attract a pair of electrons in a covalent bond
• a dipole is a difference in charge between two atoms caused by a shift in electronegativity
• if charge in distributed unevenly across a whole molecule than it will have a permanent dipole
• if polar bonds in a molecule are arranged symmetrically the dipoles will cancel out and the molecule will be non polar
• electronegativity is measured on the Pauling scale