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 shape does BF3 form?

Back

Trigonal planar.

Front

What shape does NH3 adopt?

Back

Trigonal pyramidal.

Front

Why does beryllium dichloride form a linear shape?

Back

Because it wants to minimize electron pair repulsion.

Front

What is the bond angle in water (H2O)?

Back

105 degrees.

Front

Why do molecules with a trigonal planar shape have a 120-degree bond angle?

Back

To minimize repulsion between electron pairs.

Front

What is the bond angle in a tetrahedral molecule?

Back

109.5 degrees.

Front

What is the molecular shape of CO2?

Back

Linear.

Front

How does the presence of lone pairs affect molecular geometry?

Back

Lone pairs occupy more space than bonding pairs, which can alter bond angles and molecular shape.

Front

What is the shape of a molecule with four bonding pairs and no lone pairs?

Back

Tetrahedral.