Chemical Bonding: Polar and Nonpolar Molecules

What is the definition of polarity?

• The ability of an atom to attract electrons

• The distribution of electrical charge over the atoms joined by the bond

• The shape of a molecule

• The mass of a molecule.

A molecule with a bent geometry is generally ______.

• Non-polar

• Polar

• Symmetrical

• Neutral

In the molecule HF, which atom holds the shared electrons closer?

• Hydrogen

• Fluorine

Fill in the blank: In a polar molecule like HF, the shared electrons are held closer to _______ because it is more electronegative.

• Hydrogen

• Fluorine

Fill in the blank: The molecule HF is an example of a _______ molecule due to the difference in electronegativity between hydrogen and fluorine.

• Nonpolar

• Polar

What is an example of a nonpolar molecule?

• H2

• H2O

• NH3

• CO2

What is the molecular structure of H2?

• Linear

• Bent

• Tetrahedral

• Trigonal planar

Fill in the blank: ______ atoms around a central atom will always be polar molecules.

• Different

• Same

• No

• Single

Which of the following molecules is nonpolar?

• H2

• HF

• H2O

• NH3

Which molecule has a linear structure?

• CO2

• COS

• H2O

• CH4