HOMS Review: Changes in Matter

Front

What does the law of conservation of mass state?

Back

The law of conservation of mass states that in a chemical reaction, the mass of the reactants is equal to the mass of the products; atoms are neither created nor destroyed.

Front

What is the smallest particle in an element or compound?

Back

An atom.

Front

What is a compound?

Back

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

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements that are chemically combined.

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 a pure substance?

Back

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

Front

What is the chemical formula for carbon dioxide?

Back

CO2.

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 an example of a compound?

Back

Water (H2O) is an example of a compound.

Front

What is an example of an element?

Back

Oxygen (O) is an example of an element.