VSEPR Flashcard

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 molecular geometry of a molecule with 4 bonding groups and no lone pairs?

Back

Tetrahedral.

Front

What is the bond angle in a tetrahedral molecular geometry?

Back

Approximately 109.5 degrees.

Front

What is the molecular geometry of a molecule with 2 bonding groups and 1 lone pair?

Back

Bent.

Front

How many bonding groups and lone pairs does a trigonal pyramidal molecule have?

Back

3 bonding groups and 1 lone pair.

Front

What is the molecular geometry of the nitrate ion (NO3-)?

Back

Trigonal planar.

Front

What is the bond angle in a trigonal planar molecular geometry?

Back

Approximately 120 degrees.

Front

What is the molecular geometry of a molecule with 3 bonding groups and 0 lone pairs?

Back

Trigonal planar.

Front

What is the molecular geometry of oxygen difluoride (OF2)?

Back

Bent, with bond angles less than 109.5 degrees.

Front

What is the effect of lone pairs on molecular geometry?

Back

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