Elements, Compounds and Mixtures

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together. Examples include water (H2O) and carbon dioxide (CO2).

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 (H) and oxygen (O).

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. The individual substances retain their properties. Examples include air and salad.

Front

What type of mixture is salsa?

Back

Salsa is a heterogeneous mixture because its components can be easily distinguished and are not uniformly distributed.

Front

What type of matter is air?

Back

Air is a mixture because it contains various gases (like nitrogen, oxygen, and carbon dioxide) that are not chemically bonded.

Front

What is the difference between homogeneous and heterogeneous mixtures?

Back

Homogeneous mixtures have a uniform composition throughout (like saltwater), while heterogeneous mixtures have a non-uniform composition (like a salad).

Front

Give an example of a compound.

Back

An example of a compound is water (H2O), which consists of hydrogen and oxygen atoms bonded together.

Front

Give an example of an element.

Back

An example of an element is gold (Au), which is a pure substance made of only gold atoms.

Front

What is the chemical formula for carbon dioxide?

Back

The chemical formula for carbon dioxide is CO2.

Front

Is sugar (C12H22O11) a compound or an element?

Back

Sugar (C12H22O11) is a compound because it is made up of different elements (carbon, hydrogen, and oxygen) chemically bonded together.