Posted by Alison on Sunday, May 16, 2010 at 9:59pm.
Look at the electronegativity EN). The only strictly non-polar bonds, and some might argue that even these are not 100% polar, are diatomic or triatomic molecules such as H2, N2, O3, O2, etc. If there is a difference in EN, you know the bond is polar to some degree. Books differ on what is called a 50% covalent/50% ionic bond but the general rule is that about 1.8 or 1.9 difference is a 50/50 bond. Most of the time we call those with a difference larger than 1.8 (more ionic than covalent) ionic and those with less than 1.8 (more covalent than ionic) covalent. Something in the order of 1.0 difference is about 25% ionic/75% covalent. Most personal note book sized periodic charts have a polarity scale graphed. At least mine does. A bond is polar if there is a dipole moment. I hope this helps clear things up.
Related Questions
chemistry - what is the difference between polar bonds and polar molecules. i ...
chemistry - Is 3:1:1 hexane/acetone/acetic acid a more polar or non-polar ...
chemistry - What two conditions necessary for molecules to be polar? Her's ...
Chemistry - Explain, in terms of electronegativity, why an H-F bond is expected ...
Chemistry - Explain, in terms of electronegativity, why an H-F bond is expected ...
Chemistry - Explain,in terms of electronegativity, why the H-F bond is expected ...
CHEMISTRY - 7. At pH 7.4 a weak organic acid with a pKa of 6.4 would be 60% ...
Chemistry - which of the following statements are true? a) For an acid H-O-A : ...
Chemistry-Polarity - I am having trouble understanding polarity. I think I ...
Chemistry - What happens when the nucleus of one atom attracts a pair of shared ...
For Further Reading
