Questions: In each of the molecules drawn below, one chemical bond is circled. Decide whether this bond is likely to be polar or not. If the bond is polar, write down the chemical symbol for the atom which will have more negative charge.

In each of the molecules drawn below, one chemical bond is circled. Decide whether this bond is likely to be polar or not. If the bond is polar, write down the chemical symbol for the atom which will have more negative charge.

Transcript text: In each of the molecules drawn below, one chemical bond is circled. Decide whether this bond is likely to be polar or not. If the bond is polar, write down the chemical symbol for the atom which will have more negative charge.

Solution

Solution Steps

Step 1: Identify the Circled Bond

First, we need to identify the circled bond in each of the given molecules. This step is crucial as it sets the stage for determining the polarity of the bond.

Step 2: Determine Electronegativity of Atoms

Next, we compare the electronegativity values of the two atoms involved in the circled bond. Electronegativity is a measure of an atom's ability to attract and hold onto electrons.

Step 3: Assess Bond Polarity

If the difference in electronegativity between the two atoms is significant (typically greater than 0.4), the bond is considered polar.
If the difference is small (typically less than or equal to 0.4), the bond is considered nonpolar.

Step 4: Identify the More Negative Atom

For polar bonds, the atom with the higher electronegativity will have a partial negative charge (δ-), while the atom with the lower electronegativity will have a partial positive charge (δ+).