VSEPR (2,3,4 RHED)

Front

What does VSEPR stand for?

Back

Valence Shell Electron Pair Repulsion.

Front

What is the main purpose of VSEPR theory?

Back

To predict the molecular shape based on the repulsion between electron pairs.

Front

What is the bond angle for a trigonal planar molecule?

Back

120 Degrees.

Front

What is the bond angle for a tetrahedral molecule?

Back

109.5 Degrees.

Front

What is the bond angle for a linear molecule?

Back

180 Degrees.

Front

In a polar covalent bond, how are electrons shared?

Back

Unequally.

Front

What determines if a molecule is polar or nonpolar?

Back

The symmetry of the molecule and the electronegativity difference between atoms.

Front

Is PH3 a polar or nonpolar molecule?

Back

Polar.

Front

What is the effect of lone pairs on bond angles in a molecule?

Back

Lone pairs repel more strongly than bonding pairs, reducing bond angles.

Front

What is the molecular shape of a molecule with 4 bonding pairs and no lone pairs?

Back

Tetrahedral.