Element, Compounds and Mixtures

Front

What is a compound?

Back

A compound is a pure substance formed when two or more elements chemically combine in fixed proportions.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

Is water (H2O) an element, compound, or mixture?

Back

Water (H2O) is a compound.

Front

What is the difference between a pure substance and a mixture?

Back

A pure substance has a uniform and definite composition, while a mixture contains two or more substances that retain their individual properties.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that does not have a uniform composition, such as a salad.

Front

Can compounds be separated into their elements?

Back

Yes, compounds can be separated into their elements through chemical reactions.

Front

What is an example of a compound?

Back

An example of a compound is carbon dioxide (CO2), which consists of carbon and oxygen.

Front

What is an example of a mixture?

Back

An example of a mixture is air, which contains various gases like nitrogen, oxygen, and carbon dioxide.