Front

What is an element?

Back

Something made up of one kind of atom.

Front

What is an exothermic reaction?

Back

A chemical reaction or process that releases heat.

Front

Which is a physical change?

Back

Melting butter.

Front

What is a coefficient in a chemical equation?

Back

The large number to the left of a formula.

Front

What is a reactant?

Back

A substance that takes part in and undergoes change during a reaction.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is a product in a chemical reaction?

Back

The substances that are formed as a result of a chemical reaction.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a physical property?

Back

A characteristic of a substance that can be observed without changing its identity.

Front

What is a chemical property?

Back

A characteristic that can only be observed during a chemical reaction.