Understanding Molecular Polarity and Geometry

What is one method, aside from electronegativity, to determine the polarity of a molecule?

• Molecular geometry

• Molecular weight

• Boiling point

• Atomic number

In the Lewis electron dot structure, how are valence electrons represented?

• As arrows

• As dots

• As numbers

• As lines

According to the VSEPR model, what determines the shape of a molecule?

• The type of chemical bonds

• The number of electron pairs

• The number of protons

• The atomic mass

How many lone pairs does the central atom in ammonia have in its Lewis structure?

• Three

• None

• One

• Two

What happens to the electron pairs in a molecule according to the VSEPR theory?

• They cluster together

• They stay as far apart as possible

• They form a straight line

• They become positively charged

What is the molecular geometry called when there are four electron pairs bonded to the central atom with no lone pairs?

• Linear

• Trigonal planar

• Tetrahedral

• Bent

What is the shape of a water molecule according to its molecular geometry?

• Linear

• Tetrahedral

• Bent

• Trigonal planar

Which molecular shape is characterized by having three bond pairs and one lone pair?

• Trigonal planar

• Trigonal pyramidal

• Tetrahedral

• Linear

Which of the following molecules is an example of a nonpolar molecule due to its symmetrical shape?

• Ammonia

• Water

• Carbon dioxide

• Hydrochloric acid

What is the key factor that makes a molecule polar?

• High molecular weight

• Asymmetrical shape

• Equal sharing of electrons

• Symmetrical shape