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 two bonding pairs and no lone pairs have?

Back

Linear shape.

Front

What shape does a molecule with three bonding pairs and one lone pair have?

Back

Trigonal pyramidal shape.

Front

What is the bond angle in a tetrahedral molecule?

Back

109.5 degrees.

Front

Which molecule has a bent shape?

Back

H2S (Hydrogen sulfide) has a bent shape due to the presence of lone pairs.

Front

What is the bond angle in a trigonal planar molecule?

Back

120 degrees.

Front

What is the molecular shape of CO2?

Back

CO2 has a linear shape.

Front

What determines if a molecule is polar or nonpolar?

Back

The symmetry of the molecule and the electronegativity difference between the atoms determine if a molecule is polar or nonpolar.

Front

What is the bond angle in a trigonal bipyramidal molecule?

Back

The bond angles are 90 degrees and 120 degrees.

Front

What is the molecular shape of NH3?

Back

NH3 (Ammonia) has a trigonal pyramidal shape.