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Difference between covlant bond and London dispersion forces:

  • covlant bond are intramolecular forces of attraction.
  • but londen dispersion forces are intermolecular attraction forces .

similarities Between covlant bond and London Dispersion Forces

  • London Dispersion Forces and covlant bond both of forces of attraction.

London Dispersion Force

The London dispersion force is the weakest intermolecular force. The London dispersion force is a temporary attractive force that occurs when electrons of two adjacent atoms occupy positions that form a temporary dipole. This force is sometimes called the induced dipole induced dipole attraction. The London force is the attractive force that causes a non-polar substance to condense into a liquid and freeze into a solid when the temperature drops sufficiently.

Dispersion forces exist between all molecules, whether polar or nonpolar.

Large, heavy atoms and molecules exhibit stronger dispersion forces than smaller, lighter ones. In atoms or molecules larger than

, the valence electrons are on average farther from the nucleus than in smaller atoms or molecules. They are held less tightly and are more likely to form transient dipoles.

The ease with which electron distribution around an atom or molecule is distorted is called polarizability.

London Dispersion forces are generally

stronger between more polarizable molecules. It is weaker between molecules that are difficult to polarize.

Covalent Bonds

Covalent bonds occur when electron pairs are shared by atoms. Atoms covalently bond with other atoms to increase stability. This is achieved through the formation of perfect electron shells. By sharing their outermost (valence) electrons, atoms can fill their outer electron shells and gain stability. Non-metals readily form covalent bonds with other nonmetals to achieve stability, and can form 1-3 covalent bonds with other nonmetals depending on the number of valence electrons they possess.

Octet Rule

The octet rule requires that all atoms in a molecule have eight valence electrons to be stable by sharing, losing, or gaining electrons. In covalent bonds, atoms tend to share electrons with each other in order to follow the octet rule. This is the amount of electrons required to fill the s and p orbitals (electron configuration), so 8 electrons are required. Also called noble gas composition. All atoms want to be as stable as noble gases.

To learn more about covlant bond and London Dispersion Forces , refer :

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