Elements, Compounds, 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 oxygen, hydrogen, 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 mixture?

Back

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

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout. Examples include saltwater and vinegar.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that does not have a uniform composition and the different components can be seen. Examples include trail mix and salad.

Front

What is a colloid?

Back

A colloid is a type of mixture where tiny particles of one substance are evenly distributed throughout another substance. Examples include fog and milk.

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and properties throughout. Examples include elements and compounds.

Front

Is water an element?

Back

No, water is not an element; it is a compound made of hydrogen and oxygen.

Front

What is table salt?

Back

Table salt is a compound made of sodium and chlorine (NaCl) and is considered a pure substance.

Front

What is the difference between a compound and a mixture?

Back

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