Question

A N-O bond is more polar than a P-O bond

Answer 1

what do you think?

Answer 2

A polar bond is made from elements that have a difference in electronegativity. Non-polar bonds would be bonds that consist of the same element, e.g. C-C as they have the SAME electronegativity.

Elements with a BIGGER electronegativity difference, are more polar. So, whichever element (N or P) has the biggest difference from the electronegativity of O (Oxygen) will be your answer.

Look for the element that is not close to oxygen's electronegativity. Look for the element that is furthest away from oxygen AND the one with the lowest electronegativity number out the two (P and N).
Remember, electronegativity increases to the left and up the periodic table (closer to Fluorine, as flourine is the most electronegative element).

Can you work it out looking at this table of electronegativity values for each element?

I hope this helps :)