VSEPR Theory

Front

What is VSEPR Theory?

Back

VSEPR Theory (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 does the term 'lone pair' mean in VSEPR Theory?

Back

A lone pair refers to a pair of valence electrons that are not shared with another atom and are located on the central atom in a molecule.

Front

What molecular geometry is associated with 2 bonding pairs and 0 lone pairs?

Back

Linear.

Front

What molecular geometry is associated with 3 bonding pairs and 0 lone pairs?

Back

Trigonal planar.

Front

What molecular geometry is associated with 2 bonding pairs and 1 lone pair?

Back

Bent.

Front

What molecular geometry is associated with 4 bonding pairs and 0 lone pairs?

Back

Tetrahedral.

Front

How does the presence of lone pairs affect molecular geometry?

Back

Lone pairs occupy space and repel bonding pairs, which can alter the angles between bonds and the overall shape of the molecule.

Front

What is the bond angle in a tetrahedral geometry?

Back

Approximately 109.5 degrees.

Front

What is the bond angle in a trigonal planar geometry?

Back

Approximately 120 degrees.

Front

What is the bond angle in a bent geometry with 2 bonding pairs and 1 lone pair?

Back

Less than 120 degrees.