Answer:
Ionic bonding
Definition: An ionic bond is formed when valence electrons are transferred from one atom to the other to complete the outer electron shell.
Example: A typical ionically bonded material is NaCl
Covalent bonding
Definition: A covalent bond is formed when the valence electrons from one atom are shared between two or more particular atoms.
Example: Many compounds have covalent bonding, such as polymers. Nylon rope is an example of a material that is made up of polymers. Polymer structures typically are long chains of covalently bonded carbon and hydrogen atoms in various arrangements.
Metallic bond:
Definition: A metallic bond is formed when the valence electrons are not associated with a particular atom or ion, but exist as a "cloud" of electrons around the ion centers.
Example: In the real and imperfect world, most materials do not have pure metallic, pure covalent, or pure ionic bonding; they may have other types of bonding as well. For example, iron has predominantly metallic bonding, but some covalent bonding also occurs.
