Chem Molecular Geometry with VSEPR v2

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 the electron pairs in the valence shell of the central atom.

Front

What is the bond angle in a tetrahedral molecule?

Back

The bond angle in a tetrahedral molecule is approximately 109.5 degrees.

Front

Define polar molecule.

Back

A polar molecule is a molecule that has a net dipole moment due to the presence of polar bonds, which arise from differences in electronegativity between the bonded atoms.

Front

What shape does NH3 (ammonia) have?

Back

NH3 has a trigonal pyramidal shape.

Front

What is the bond angle in a trigonal planar molecule?

Back

The bond angle in a trigonal planar molecule is 120 degrees.

Front

How does the shape of CO2 differ from that of H2O?

Back

CO2 is linear, while H2O is bent due to the presence of lone pairs on the oxygen atom.

Front

What is the molecular geometry of CH4 (methane)?

Back

The molecular geometry of CH4 is tetrahedral.

Front

What is the significance of lone pairs in molecular geometry?

Back

Lone pairs occupy space and can affect the bond angles and overall shape of the molecule.

Front

How do you determine if a molecule is polar or non-polar?

Back

To determine if a molecule is polar or non-polar, assess the symmetry of the molecule and the electronegativity differences between the atoms.

Front

What is the bond angle in a bent molecule?

Back

The bond angle in a bent molecule is typically less than 120 degrees.