Practice Problems Unit 4 Lesson 2

Front

What is the Lewis Dot structure?

Back

A representation of the valence electrons in a molecule, showing how they are arranged among atoms.

Front

How many bonding pair electrons are in SF4?

Back

4 bonding pair electrons.

Front

What is the molecular shape of a molecule with 3 bonded atoms and 2 lone pairs?

Back

T-Shape.

Front

What is the predicted molecular geometry of BrF3?

Back

T-shaped.

Front

What does it mean for a molecule to have polar bonds but be nonpolar?

Back

The molecule has polar bonds due to differences in electronegativity, but its symmetrical shape cancels out the dipoles.

Front

How many lone pair electrons are in PCl5?

Back

0 lone pair electrons.

Front

What is the significance of lone pairs in molecular geometry?

Back

Lone pairs occupy space and can affect the shape of the molecule, influencing bond angles.

Front

What is the molecular geometry of a molecule with 5 bonded atoms and no lone pairs?

Back

Trigonal bipyramidal.

Front

What is the difference between polar and nonpolar molecules?

Back

Polar molecules have an uneven distribution of charge, while nonpolar molecules have an even distribution.

Front

How do you determine the polarity of a molecule?

Back

By analyzing the electronegativity differences between atoms and the molecular geometry.