All of the following statements are matched correctly for ionic and covalent bonds EXCEPT:
Correct answer: C. Ionic bond is directional while covalent bond is non directional.
- A. Ionic bonds are formed between atoms of elements with very different electronegativities while Covalent bonds are formed between atoms of elements with similar electronegativities
- B. Covalent compounds have low melting and boiling points and Ionic compounds have high melting and boiling points.
- C. Ionic bond is directional while covalent bond is non directional.
- D. Covalent compounds are poor conductors of electricity while Ionic compounds are good conductors of electricity
Explanation
Ionic bonds are formed between atoms of different elements with very different electronegativities. The more electronegative atom will attract the electrons from the less electronegative atom, forming a positively charged ion (cation) and a negatively charged ion (anion). The attraction between the oppositely charged ions is what holds the ionic bond together. Because ionic bonds are formed by the transfer of electrons, they are not directional. The ions are attracted to each other regardless of their orientation. Covalent bonds are formed between atoms of the same element or of elements with similar electronegativities. The atoms share electrons in order to complete their valence shells. The shared electrons are attracted to the nuclei of both atoms, which is what holds the covalent bond together. So this is directional.
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