Why are some covalent bonds polar?
(FYI only) In a covalent bond, two atoms share a pair of electrons (one from each atom) in an attempt to fill the outermost shell of electrons.in both atoms. If the two atoms involved are the same element, then the electrons will be shared equally. However, if the atoms involved in the bond are two different elements, the electrons may be shared unequally because one of the atoms may “want” the electrons of the shared pair more than the other. The electrons will spend more time near that atom. Since the electrons are negative, that atom which has “sucked” the electrons toward it will acquire a partial negative charge, and the other atom, which is now electron deficient, will acquire a partial positive charge. Keep in mind that these are ony partial charges since the electrons are not completely transferred as in an ionic bond; they are simply spending more time nearer one atom than the other. Such a bond, with one partial positive atom and one partial negative atom can be thought of as
