Elements and Mixtures CFA

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. Examples include water (H2O) and carbon dioxide (CO2).

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout. Examples include saltwater and air.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the composition is not uniform throughout. Examples include salad and sand in water.

Front

How can you identify an element in a model?

Back

An element in a model is represented by a single type of atom or a symbol from the periodic table.

Front

What is the difference between a compound and a mixture?

Back

A compound is a chemical combination of elements, while a mixture is a physical combination of substances that retain their individual properties.

Front

What are the four categories of matter?

Back

The four categories of matter are elements, compounds, homogeneous mixtures, and heterogeneous mixtures.

Front

Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances by chemical means.

Front

What is an example of a homogeneous mixture?

Back

An example of a homogeneous mixture is vinegar, which has a consistent composition throughout.

Front

What is an example of a heterogeneous mixture?

Back

An example of a heterogeneous mixture is a bowl of cereal with milk, where the components can be seen and separated.