polarity

• When two atoms in a covalent bond have the same electronegativity the covalent bond is nonpolar
• When two atoms in a covalent bond have different electronegativities the covalent bond is polar and the electrons will be drawn towards the more electronegative atom
• the more greater the difference in electronegativity the greater the polarity
• less electronegative atom gets a partial positive charge
• the more electronegative gets a negative charge
• polar molecules have permanent dipoles