VSEPR Review

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 3 shared pairs and 0 unshared pairs?

Back

Trigonal Planar.

Front

What is the molecular geometry of a molecule with 4 shared pairs and 0 unshared pairs?

Back

Tetrahedral.

Front

What molecular geometry would PH3 have?

Back

Trigonal Pyramidal.

Front

What is the molecular geometry of HCN?

Back

Linear.

Front

Determine the molecular shape of carbon tetrafluoride (CF4).

Back

Tetrahedral.

Front

What is the effect of lone pairs on molecular geometry?

Back

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

Front

What is the bond angle in a trigonal planar molecule?

Back

120 degrees.

Front

What is the bond angle in a tetrahedral molecule?

Back

109.5 degrees.

Front

How does the presence of double bonds affect molecular geometry?

Back

Double bonds count as one region of electron density but can affect the angles and shape due to their stronger repulsion compared to single bonds.