2007-12-11 13:47:49 · 4 answers · asked by ruby 2 in Science & Mathematics ➔ Chemistry
Draw the Lewis diagram for the compound and examine the distribution of charge on the molecule. Remember that bonding and non-bonding electron pairs induce different effects on the molecules shape and hence its distrbution of charge. If charge is not symmetrically distributed, then the molecule is polar, i.e. it has a non-negligible dipole moment. If instead you are attempting to examine the polarity of a covalent bond, you may assume that if the electronegativity difference of the two bonding atoms is between .4 and 1.7, then the bond is polar, if less, nonpolar. Never confuse polar bonds and molecular polarity; there is, in general, no correlation between the two phenomena.
2007-12-11 14:02:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
if the electronegativity of one side of the molecule is greater than the other. this will cause a electromagnetic pull and other polar molecules with opposite charges will line up accordingly
2007-12-11 13:55:16 · answer #2 · answered by Matt 1 · 0⤊ 0⤋
Mix it with water. If it dissolves it is polar. If it does not mix, it is not polar.
2007-12-11 13:55:23 · answer #3 · answered by Doctor J 7 · 0⤊ 0⤋
-when the difference in electronegativity is between 0.5 - 1.7
-when it dissolves in a polar substance
2007-12-11 13:55:00 · answer #4 · answered by Helena 2 · 0⤊ 0⤋