Lewis Structures, VSEPR, Polarity and IMFs

Front

What is a Lewis Structure?

Back

A Lewis Structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Front

How many total valence electrons are in the nitrate ion (NO3-)?

Back

24 valence electrons.

Front

What is the shape of a methane (CH4) molecule?

Back

Tetrahedral.

Front

What type of intermolecular forces does ammonia (NH3) exhibit?

Back

Hydrogen bonding, which is a strong type of dipole-dipole interaction.

Front

Which molecule is polar: CH4, Xe, H2O, or CO2?

Back

H2O (water) is a polar molecule.

Front

What is the relationship between intermolecular forces and boiling points?

Back

Substances with stronger intermolecular forces generally have higher boiling points.

Front

What is VSEPR theory?

Back

VSEPR (Valence Shell Electron Pair Repulsion) theory is a model used to predict the geometry of individual molecules based on the repulsion between electron pairs.

Front

What is the molecular geometry of ammonia (NH3)?

Back

Trigonal pyramidal.

Front

Define polarity in molecules.

Back

Polarity refers to the distribution of electrical charge over the atoms joined by the bond. Polar molecules have a net dipole moment due to the presence of polar bonds.

Front

What is an example of a nonpolar molecule?

Back

Carbon dioxide (CO2) is an example of a nonpolar molecule.