There is a continuum of bonding type from pure ionic e.g. NaCl to pure covalent e.g. Cl2.
Bonding types are a continuum of types between purely ionic and purely covalent.In covalent bonds, since the difference in electronegativity between two bonding atoms can be zero or very large, there is a polarity continuum, ranging from nonpolar to highly polar bonds. In an extreme case where the difference in electronegativity is very large, the bond ceases to be covalent and becomes ionic.
Bonding types are a continuum of types between purely ionic and purely covalent.In covalent bonds, since the difference in electronegativity between two bonding atoms can be zero or very large, there is a polarity continuum, ranging from nonpolar to highly polar bonds. In an extreme case where the difference in electronegativity is very large, the bond ceases to be covalent and becomes ionic.