Elements, Compounds and Mixtures

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen, oxygen, and gold.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. For example, water (H2O) is a compound made of hydrogen and oxygen.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. The individual substances retain their properties. Examples include air and salad.

Front

Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances.

Front

What is the chemical formula for sulfuric acid?

Back

H2SO4.

Front

What are the components of sulfuric acid (H2SO4)?

Back

2 hydrogen, 1 sulfur, and 4 oxygen.

Front

What is the difference between a mixture and a compound?

Back

A mixture is a physical combination of substances that can be separated, while a compound is a chemical combination that cannot be separated by physical means.

Front

Is air a mixture or a compound?

Back

Air is a mixture.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that does not have a uniform composition, such as a salad.