Why is HF a covalent bond even though the difference in EN value between H and F is 1.9?

Answer

day an,

I refer to my answer to question number question 21285 target=”_blank” title=”Ionic character”>21285, where a similar problem was posed. Every bond between two atoms has a certain ionic and covalent character. If we calculate the percentage of ionic character for HF we arrive at 59.4%. This means that the covalent character of this bond is 100-59.4 = 40.6%. This bond is thus mainly ionic.