which molecule is more polar. H-F or H-Br? In terms of electronegativity, F is more electronegative than Br, hence it attracts the shaired pair of electrons closer than Br, hence HF should be more polar. on the other hand in terms of polarizability, Br is bigger in size and hence, greater polarizability by the hydrogen atom as compared to flurine.Hence, HBr shud be more polar. I am getting contradicting answers. please explain which molecule is more polar and why>?

ACHAL AGARWAL , 9 Years ago

Grade 12th pass