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How to tell which bond is more polar?

January 30, 2017

To check which bond is most polar, you must first find an electronegativity table (easily found by googling). You will then identify 2 atoms that make the bond, and find their electronegativity difference. Whoever has the highest electronegativity difference, is most polar.



Ex: Which bond is most polar H-Cl or C-Br?

Answer: H-Cl because it's electronegativity different is 3-2.1=0.9 which is great then that for C-Br (2.8-2.5=0.3)


Note that if a bond is made of two identical atoms such as O2, their electronegativity difference will always be zero, making the bond always non-polar. 



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