Unit 3 Review: Introduction to Chemical Bonding

Which statement correctly describes the two materials shown?

• The rubber polymer used in rubber bands is a short molecule that creates inflexible materials.

• The rubber polymer used in rubber bands is a long molecule that creates flexible materials.

• Calcium oxide, also known as lime, is a short molecule so it makes flexible materials.

• Calcium oxide, also known as lime, is a long molecule so it makes inflexible materials.

Tags

NGSS.MS-PS1-1

An engineer is creating a new material that will conduct electricity. Which element would the engineer choose? Why?

• Sulfur. It is a good insulator

• Magnesium. It is a good insulator.

• Sulfur. It has contains that have the ability to conduct electricity.

• Magnesium. It contains ions that have the ability to conduct electricity.

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which model shown could represent a diatomic molecule of I₂?

• Model 1

• Model 2

• Model 3

• None

Which model could represent a compound that is soluble in water, conducts heat and electricity, and has a high melting point?

• Model 1

• Model 2

• Model 3

• None

Which of the following questions would a chemistry student need to ask before writing the name of a binary chemical compound?

• Are both elements nonmetals?

• What is the mass number of each element?

• Is one of the elements a metal?

• How many valence electrons does the cation have?

What is the correct name and formula for the binary ionic compound formed from Mn⁴⁺ and O^2-?

• Mn₂O₄, Manganese oxide

• Mn₄O₂, Manganese(IV) oxide

• MnO₂, Manganese(IV) dioxide

• MnO₂, Manganese(IV) oxide

What is the correct name for the compound with the formula N₂O₅?

• nitrogen pentoxide

• nitrogen (V) oxide

• nitrogen oxide
• dinitrogen pentoxide

What is the chemical formula of the ionic compound shown?

• Al₂O₃

• AlO

• Al₃O₂

• Al₃O₃

What type of chemical bonding is shown in the model?

• nonpolar covalent

• polar covalent

• ionic

• metallic

What is the correct name for CuO?

• copper oxide

• copper monoxide

• copper (II) oxide

• copper (I) oxide