In an ionic bond, the atoms are certain mutually via the appeal between oppositely-charged ions. as an occasion, sodium and chloride type an ionic bond, to make NaCl, or table salt. In a covalent bond, the atoms are certain via shared electrons. If the electron is shared the two between the atoms forming a covalent bond, then the bond is asserted to be nonpolar. regularly, an electron is greater attracted to a minimum of one atom than to a various, forming a polar covalent bond.