Question

What is the difference between polar molecule and polar bonds?

Answer 1

if you add up the dipoles (they are vectors), the net result in zero.

Answer 2

I understand that thanks, but we aren't going to be given an electronegative chart. How are we supposed to determine if its a polar bond w/o the chart?

Answer 3

i guess you have to memorize some common polar bonds. :S

if you know the position of the elements you're dealing with you can estimate it, since the trend is that electronegativity increases and you go up a group and down a row: