Verified answer

SNAP

symmetrical is nonpolar, asymmetrical is polar

sketch them

lower volume and watch

http://www.kentchemistry.com/links/bonding/molecul...

I know this is like, three years old but I just did the question on the homework and got it right:

nonpolar: CBr4

least polar: CH2Br2

Most polar: CH2F2

CBr4

the molecule has equal negative charge surrounding it, with no areas of net positive charge

CH2Br2, CH2F2, CH2Cl2, are distinctly polar

CF2Cl2, CF2Br2 are partly polar

CBr4 is non-polar

the least polar substance, excluding CBr4 would be CF2Cl2 most likely

i'm no longer likely to supply you the respond right away out. i'm going to tell you that the version in electronegativities make it easier to to comprehend this is extra polar. do no longer choose for to look that up? Then learn your periodic table. Oxygen and different aspects who can genuinely income some electrons (or much less) to get carry of an octet are distinctly electronegative. aspects who will supply up electrons to income an octet are no longer very electronegative in any respect and are frequently on the left hand area of the periodic table. Now, if a distinction in electronegativity make it easier to to comprehend the polarity of the pattern, how polar do you think of a C - C bond could be? no longer very considering that a Carbon is a carbon is a carbon suitable? That being mentioned, how polar do you think of a Br2 molecule could be? I particularly have confidence in you. i think of you will get by using this minor situation using a good periodic table and that dazzling suggestions of yours!