What is the difference between polar covalent and nonpolar covalent


Asked by admin @ in Biology viewed by 329 People


Which statement correctly describes the difference between a polar covalent bond and a nonpolar covalent bond?

A: Nonpolar covalent bonds involve sharing of protons whereas polar covalent bonds involve transfer ofprotons.B: Nonpolar covalent bonds involve sharing of electrons whereas polar covalent bonds involve transfer of electrons.C: Nonpolar covalent bonds involve sharing of protons whereas polar covalent bonds involve sharing of electrons.D: Nonpolar covalent bonds involve two atoms that have equal electonegativity whereas polar covalent bonds involve two atoms that are unequal in their electronegativity.E: Nonpolar covalent bonds involve two electrons that have equal electonegativity whereas polar covalentbonds involve two electrons that are unequal in their electronegativity.​

Answered by admin @



Considering the definition of covalent bond, the correct answer is option D: Nonpolar covalent bonds involve two atoms that have equal electonegativity whereas polar covalent bonds involve two atoms that are unequal in their electronegativity.

A covalent bond is a force that joins two atoms of non-metallic elements to form a molecule. Atoms share pairs of electrons from their most superficial layer (called the valence layer) to achieve the stability of the molecule that has been formed with the bond and thus comply with the octet rule.

On the other side, electronegativity refers to the tendency of the atom of a given element to attract electrons.

So, the covalent bond between two atoms can be polar or nonpolar.  

Polarity depends on the difference in electronegativity of the joining elements. The greater the electronegativity difference, the greater the polar character of the bond. The most electronegative element will be the one that most strongly attracts the shared electrons, then a negative partial charge will be generated on said element, while a positive partial charge will be generated on the other element (less electronegative).


Finally, nonpolar covalent bonding occurs when pairs of electrons are shared between atoms that have the same or very similar electronegativity, favoring an equitable distribution of electrons.


In summary, the correct answer is option D: Nonpolar covalent bonds involve two atoms that have equal electonegativity whereas polar covalent bonds involve two atoms that are unequal in their electronegativity.

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