Question: what is the difference in electronegativity between h and f?
Answer: Figure 5. As the electronegativity difference increases between two atoms, the bond becomes more ionic. ... For example, the H and F atoms in HF have an electronegativity difference of 1.9, and the N and H atoms in NH3 a difference of 0.9, yet both of these compounds form bonds that are considered polar covalent.