Elements, Compounds, Mixtures

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically combined, such as air or salad.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means, like hydrogen (H) or oxygen (O).

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together, such as water (H2O) or sodium chloride (NaCl).

Front

Give an example of a mixture.

Back

Air is an example of a mixture, as it contains various gases like nitrogen, oxygen, and carbon dioxide.

Front

What happens when you add raspberries to a bowl of blueberries?

Back

You create a mixture, as both fruits retain their individual properties.

Front

What is the difference between a mixture and a compound?

Back

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

Front

Which of the following is an example of an element: H2O, H2, NaCl, CaCO3?

Back

H2 is an example of an element.

Front

What is the definition of a solution?

Back

A solution is a homogeneous mixture where one substance (solute) is dissolved in another (solvent), like saltwater.

Front

Can a compound be separated into its elements?

Back

Yes, a compound can be separated into its elements through chemical reactions.

Front

What is the main characteristic of a homogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, like vinegar.