‚Äč

What is the difference between polar and nonpolar covalent bonds?

Answer

In nonpolar covalent bonds, electrons are shared equally by both members of the bond, but they are shared unequally in polar covalent bonds. Polar covalent bonds occur when there is a difference in electronegativity, or electron affinity, between covalently bonded atoms. The polarity, or lack thereof, of a molecule greatly affects how it interacts with other molecules.

Polarity in covalent bonds is highly variable, depending on the elements involved. The only truly nonpolar covalent bonds are in molecules made of a single element, like nitrogen or oxygen gas. Otherwise, there is always a difference in electron affinity between the members of a bond, so any covalent bond between two different elements is at least slightly polar. In some cases, such as carbon and hydrogen, the difference is very slight.

Just because the covalent bonds in a molecule are polar does not mean the molecule itself is polar. For instance, oxygen has a much greater electron affinity than carbon, but carbon dioxide is not polar. This is because the oxygen atoms sit on opposite sides of the carbon, so their charges cancel each other out.

Polar covalent charges will only form up to a certain difference in electronegativity. Beyond that, instead of sharing any electrons in a covalent bond, the more electronegative member will steal them, forming an ionic bond.

Q&A Related to "What is the difference between polar and nonpolar..."
In Nonpolar covalent bonds, the electrons in bond
http://www.chacha.com/question/what-is-the-differe...
Ionic. bonds involve the. complete transfer. of electrons from one atom to another. Non-polar. covalent bonds involve the. equal sharing. of electrons by atoms that are boned together
http://wiki.answers.com/Q/What_is_the_meaning_of_t...
E is the only "clear" polar bond. Oxygen is electronegative so it pulls electrons creating a " charge on it.
http://answers.yahoo.com/question/index?qid=201002...
Polar-electrons are shared unequally (the electronegative forces are not equally spread which causes a charge in the molecule) Non-Polar-the electrons are equally shared.the electronegative
http://answers.yahoo.com/question/index?qid=200901...
Explore this Topic
Iodine has a non-polar covalent bond with 7 electrons with 2 of those electrons equally sharing a atom. This happens when two non-metals share electrons. Iodine ...
The difference between a polar and nonpolar molecule is that the polar molecule has an ionic bond. This can also be called a polar covalent bond. The nonpolar ...
HF, or hydrogen flouride, is polar. The covalent bonds in the molecule are polar. The covalent bond electrons are displaced and drawn toward the electronegative ...
About -  Privacy -  Your Cookie Choices  -  Careers -  About P.G. Wodehouse -  Help -  Feedback  -  Sitemap  © 2014 IAC Search & Media