ELEMENTS, COMPOUNDS, AND MIXTURES

Front

What is a pure substance?

Back

A pure substance is either an element or a compound.

Front

What does a mixture of two elements look like?

Back

A mixture of two elements consists of two different types of atoms that are not chemically bonded.

Front

Which compound is represented by the particle diagram of CO2?

Back

CO2 is carbon dioxide, consisting of one carbon atom and two oxygen atoms.

Front

What is an example of an element?

Back

Oxygen is an example of an element.

Front

What is a mixture of elements?

Back

A mixture of elements contains two or more different elements that are not chemically combined.

Front

What distinguishes a compound from a mixture?

Back

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

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

Front

What is a homogeneous mixture?

Back

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

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture consists of visibly different substances or phases, such as a salad.