Elements, Compounds, and Mixtures

Front

What is the definition of an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means and consists of only one type of atom.

Front

Is water an element?

Back

No, water is a compound made up of two different elements: hydrogen and oxygen.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements chemically bond together.

Front

Give an example of an element.

Back

Oxygen (O) is an example of an element.

Front

What distinguishes a mixture from a compound?

Back

A mixture is a combination of two or more substances that are not chemically bonded, while a compound consists of substances that are chemically bonded.

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout.

Front

What is an example of a mixture?

Back

Air is an example of a mixture, as it contains multiple gases that are not chemically bonded.

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has a non-uniform composition.

Front

What is the significance of the periodic table in understanding elements?

Back

The periodic table organizes all known elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element.