has electronsdistributedunevenly throughout the molecule, with partialpositivecharge on one part of the molecule and a partialnegative on another part
one atom is moreelectronegative than the other it will withdraw more electrons towards itself from the covalent bond, leaving the other atom with lesselectrons.
which has a greateramount of electrons is given a δ- charge and the atom which has lesselectrondensity is given a δ+ charge.