Question

choose the bond below that is least polar. choose the bond below that is least polar. c-o c-as c-h p-f c-f

Answer 1

The least polar bond is the C-As bond, which is a nonpolar covalent bond.

Step-by-step explanation:

A bond is categorized as a nonpolar covalent, polar covalent, or an ionic bond based on the electronegative difference of the bonded atoms. In this case, we can compare the electronegativity differences for each bond:

1. C-O: Electronegativity difference = 3.5 - 2.5 = 1.0 (polar covalent)
2. C-As: Electronegativity difference = 2.5 - 2.1 = 0.4 (nonpolar covalent)
3. C-H: Electronegativity difference = 2.5 - 2.1 = 0.4 (nonpolar covalent)
4. P-F: Electronegativity difference = 3.0 - 4.0 = 1.0 (polar covalent)
5. C-F: Electronegativity difference = 3.5 - 4.0 = 0.5 (polar covalent)

From the given options, the bond that is least polar is the C-As bond, which is a nonpolar covalent bond.

Answer 2

The C-H bond is the least polar bond among the options listed because it has the smallest difference in electronegativity between the bonded atoms, which is less than 0.5, classifying it as a nonpolar covalent bond.

Step-by-step explanation:

The bond among the given options that is the least polar is the C-H bond. This is because the difference in electronegativity between the carbon atom (approximately 2.55) and the hydrogen atom (approximately 2.20) is quite minimal, roughly 0.35. According to the electronegativity guidelines, a bond is considered nonpolar covalent if the difference in electronegativities is less than 0.5.

When discussing bonds, the polarity of a bond is determined by the difference in electronegativity between the two atoms. The C-O, P-F, and C-F bonds are more polar than the C-H bond, with C-F being the most polar due to the large electronegativity difference between carbon and fluorine. The C-As bond is more polar than the C-H bond but less polar than the C-O, P-F, or C-F bonds due to arsenic's electronegativity being closer to that of carbon.

However, since C-H has the smallest difference in electronegativities and falls below 0.5, it is correctly labeled as a nonpolar covalent bond, making it the least polar option among those provided.