Chemical Reaction Quiz (50 Points)

In the diagram below, the letters and numbers showing the types and number of atoms that repeat to make up a substance are called a _____________________.

• product

• reactant

• chemical formula

• scale

The diagram below shows the repeating groups of atoms that make up two samples. Both samples are red powdery solids at room temperature. Will the other properties of the two samples be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

• The other properties will be different because there are more repeating groups of atoms in Sample 1.

• The other properties will be the same because both samples are red at room temperature.

• The other properties will be the same because both samples are powdery solids at room temperature.

• The other properties will be same because the repeating groups of atoms that make up the two samples are the same.

______________ a process in which atoms rearrange to form new substances.

• chemical formula

• molecule

• chemical reaction

• atom

A company that makes frying pans needs to create a new substance to coat the pans. The substance must have a high melting point. To create this new substance, workers mixed together two substances that melt at low temperatures in a sealed container. The diagram below shows the repeating groups of atoms that make up the two starting substances. After mixing, the workers found two substances that melt at higher temperatures in the sealed container. (Nothing had escaped.) Which of the diagrams below shows the repeating groups of atoms that make up the ending substances?

• Diagram A

• Diagram B

• Diagram C

• Diagram C

5. What is the temperature at which a substance changes from the liquid phase to the gas phase?

• chemical reaction

• melting point

• boiling point

• freezing

Andres is a chemist working at a company that makes ink. To make a new kind of ink, Andres mixed two liquid substances together in a sealed container. The diagram below shows the repeating groups of atoms that make up the two starting substances. After mixing, Andres found two solid substances in the sealed container. (Nothing had escaped.) Which of the diagrams below shows the repeating groups of atoms that make up the ending substances?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

What is a group of atoms joined together in a particular way called?

• atom

• molecule

• substance

• property

Paula works at a paint company and is developing new ingredients to make paint safer to use. She mixed two colorless substances together in a sealed container. The diagram below shows the repeating groups of atoms that make up the two starting substances.After mixing, Paula found two yellow substances in the sealed container. (Nothing had escaped.) Which of the diagrams below shows the repeating groups of atoms that make up the ending substances?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Something that is made of all the same atoms or groups of atoms

• property

• atom

• substance

• molecule

Something that can be observed about a substance, such as color, smell, or boiling point

• substance

• molecule

• property

• corrosive