Taylor Olson is an actress, known for Under the Influence (2008).
An ionic bond is formed when an electron is essentially transferred from one atom of a pair to the other creating ions. Sodium chloride is an example of a compound with this type of bond. These compounds exist as a crystal lattice with all the ions stacked in definite patterns. The following picture is a representation of a cubic crystal of ...
The short answer is that most ionic bonds are formed between a metal and a non-metal, like NaCl. Covalent bonds form between non-metals like hydrogen, carbon, oxygen, and nitrogen like H 2 O or CO 2. The long answer has to do with electronegativity, the pulling power or attraction for electrons in a chemical bond.