Question

the bond in hf is best described as: * 5 points
nonpolar covalent
polar covalent
ionic
metallic

Explanation:

The electronegativity of hydrogen is approximately 2.2 and that of fluorine is 4.0. The difference in electronegativity ($\Delta\chi$) between H and F is $4.0 - 2.2= 1.8$. A polar - covalent bond has an electronegativity difference in the range of approximately 0.5 - 2.0. Non - polar covalent bonds have a very small electronegativity difference (less than 0.5), ionic bonds have a large electronegativity difference (usually greater than 2.0), and metallic bonds occur between metals.

Answer:

Polar covalent