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 (H), oxygen (O), and gold (Au).

Front

Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. An example is sugar (C12H22O11).

Front

Is sugar (C12H22O11) an element or a compound?

Back

Sugar is a compound.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Examples include air, milk, and gasoline.

Front

Is air a mixture, compound, or element?

Back

Air is a mixture.

Front

What are the two types of mixtures?

Back

The two types of mixtures are homogeneous mixtures (uniform composition) and heterogeneous mixtures (distinct, separate components).

Front

Give an example of a homogeneous mixture.

Back

An example of a homogeneous mixture is saltwater.

Front

Give an example of a heterogeneous mixture.

Back

An example of a heterogeneous mixture is a salad.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed from two or more elements chemically bonded, while a mixture is a physical combination of substances that retain their individual properties.