Chapter 10.3: Molecular Shape and Molecular Polarity

Flashcards from Chapter 10.3 of Chemistry: The Molecular Nature of Matter and Change.

Bond polarity

This is created through an electronegativity difference between two specific atoms

Molecular polarity

This is affected by atom pair bond polarities and molecular shapes, creating an overall charge denoted by δ+ and δ- signs

Dipole moment (μ)

A measure of molecular polarity measured in debyes (D), equal to 3.34 × 10^-30 coulomb meters

• Measures the overall charge over the distance present

Through the presence of similar, symmetrically arranged atoms with no lone pairs, or the presence of lone pair forces that cancel out.

How can a nonpolar molecule form with polar bonds?

When the atoms surrounding the central atom are nonuniform, or a lone pair is present.

When is a polar molecule formed?

Determine the electronegativity differences present in each bond and determine the forces that remain after canceling each bond out. Make sure to account for arrangement in isomers.

How do I determine molecular polarity?