VSEPR: Predicting Molecular Shapes (Geometry)

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 molecular shape is associated with four bonding pairs and no lone pairs?

Back

Tetrahedral.

Front

Which molecular shape is characterized by three bonding pairs and one lone pair?

Back

Trigonal pyramidal.

Front

What is the molecular shape of water (H₂O)?

Back

Bent structure.

Front

Define a lone pair in the context of molecular geometry.

Back

A lone pair is a pair of non-bonding electrons located on the central atom of a molecule.

Front

What is the molecular geometry of ammonia (NH₃)?

Back

Trigonal pyramidal.

Front

Which molecule has a linear shape?

Back

Carbon dioxide (CO₂).

Front

What is the effect of lone pairs on molecular shape?

Back

Lone pairs repel more strongly than bonding pairs, which can alter the bond angles and overall shape of the molecule.

Front

How does VSEPR theory help in predicting molecular shapes?

Back

VSEPR theory helps predict molecular shapes by considering the repulsion between electron pairs, allowing for the determination of the arrangement of atoms in space.

Front

What is the bond angle in a tetrahedral molecule?

Back

Approximately 109.5 degrees.