Lesson 12: Forming Compounds

Multiple Choice

Which of the following best describes a compound?

• A substance made up of two or more elements chemically combined

• A substance made up of only one type of atom

• A mixture of different substances

• A substance that cannot be broken down

Multiple Select

Which of the following are properties of ionic compounds?

• Have high melting points

• Form crystals

• Are gases at room temperature

• Dissolve in water to form solutions that conduct electricity

Multiple Choice

What happens to a sodium atom when it forms an ionic bond with chlorine?

• It gains an electron and becomes negatively charged

• It loses an electron and becomes positively charged

• It shares electrons equally with chlorine

• It does not change

Multiple Select

Which statements are true about the formation of ions in ionic compounds?

• A metal atom loses electrons to become a cation

• A non-metal atom gains electrons to become an anion

• Both atoms gain electrons

• Electrons move from a metal to a non-metal

Multiple Choice

What is the name of the connection between atoms that results from the attraction between positive and negative ions?

• Covalent bond

• Metallic bond

• Hydrogen bond

• Ionic bond

Multiple Choice

How do ionic bonds influence the arrangement of ions in a solid compound such as table salt?

• They cause ions to group randomly.

• They cause ions to group in pairs only.

• They cause ions to group together in an alternating pattern called a crystal arrangement.

• They prevent ions from grouping together.

Multiple Choice

When naming an ionic compound, which part of the name changes to end with 'ide'?

• The metal ion

• The non-metal ion

• Both ions

• Neither ion

Fill in the Blanks

The name of the ionic compound formed from sodium and chlorine is sodium

.

Multiple Choice

Which of the following formulas is correctly matched with its compound name?

• NaF - Potassium Fluoride

• KF - Sodium Fluoride

• MgCl2 - Magnesium Chloride

• AgCl3 - Calcium Phosphide

Multiple Choice

Which of the following is NOT an example of a molecular compound?

• H₂O

• CO₂

• CCl₄

• Sodium chloride