1.9 VSEPR

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 shape does a molecule with four bonding pairs and no lone pairs have?

Back

Tetrahedral shape.

Front

What is the bond angle in a tetrahedral molecule?

Back

109.5 degrees.

Front

Which molecule has a trigonal planar shape?

Back

BF3 (Boron Trifluoride) has a trigonal planar shape.

Front

What is the bond angle in a trigonal planar molecule?

Back

120 degrees.

Front

How does the presence of lone pairs affect molecular geometry?

Back

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

Front

What is the molecular geometry of CH4?

Back

Tetrahedral.

Front

What is the molecular geometry of CO2?

Back

Linear.

Front

What is the difference between polar and nonpolar molecules?

Back

Polar molecules have an uneven distribution of electron density, leading to a dipole moment, while nonpolar molecules have an even distribution of electron density.

Front

What is the molecular geometry of water (H2O)?

Back

Bent.