Unit 2: Chemical Formulas and Equations Vocabulary

Front

What do we call a substance consisting of a single atom?

Back

Element

Front

What is a change in which the characteristics of a substance are only changed physically and the chemical composition stays the same?

Back

Physical change

Front

What do we call a chemical substance made up of 2 or more different types of atoms bonded together?

Back

Compound

Front

What is the term for the result of a chemical reaction, often represented in a formula?

Back

Product

Front

What do we call a substance composed of 2 or more elements chemically combined in a definite proportion?

Back

Compound

Front

What is the term for a substance that cannot be broken down into simpler substances by chemical means?

Back

Element

Front

What is the difference between a mixture and a compound?

Back

A mixture is a physical combination of substances, while a compound is a chemical combination of elements.

Front

What is the law that states that matter cannot be created or destroyed in a chemical reaction?

Back

Law of Conservation of Mass

Front

What is the term for the starting materials in a chemical reaction?

Back

Reactants

Front

What is the process called when a substance changes from a solid to a liquid?

Back

Melting