Covalent Bonding Model - AP Chemistry

Which of the following compounds would have the most covalent bond character?

• MgCl₂

• Cu

• NaO

• SiO₂

Answer explanation

In general, nonmetals form covalent bonds. However, the greater the difference in electronegativity, the more polar, and therefore less covalent.

A compound is found to have a relatively high melting point and conducts electricity as a solid and liquid. It is most likely what type of compound?

• Metallic

• Ionic

• Covalent (molecular solid)

• Network Covalent

A solid is found to not conduct electricity in the solid or aqueous state and has an extremely high melting point. It is most likely what type of compound?

• Metallic

• Ionic

• Covalent (molecular solid)

• Network Covalent Solid

When bonds are broken, energy is...

• required

• released

The amount of energy associated with a covalent bond (bond enthalpy) is negative because...

• that's how much energy was released when the bond was formed

• that's how much energy was released when the bond is broken

What has a higher bond enthalpy, AB or CD?

• AB

• CD

What has a shorter bond length, AB or CD?

• AB

• CD

Given the two graphs are for S-Cl and O-Cl (Sulfur and Oxygen), which like most likely represents S-Cl?

• AB

• CD

Given the graphs represent N₂ and O₂ (Nitrogen and Oxygen) which is most likely to represent N?

• AB

• CD

In general, what element will go in the center of your Lewis structure?

• Largest

• Smalles

• Least Electronegative

• Most Electronegative