Chemistry -- 8th Grade Science Review

Front

In a balanced equation, the number of atoms in the ______ and _____ must be equal.

Back

Product, Reactant

Front

What is an example of a compound?

Back

CO (Carbon Monoxide)

Front

What is a Coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules are involved.

Front

How many elements are in the chemical formula CH3CO2?

Back

3 (Carbon, Hydrogen, Oxygen)

Front

What best describes a physical change?

Back

Bubbles form in boiling water.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances.

Front

What is a chemical formula?

Back

A way of expressing information about the atoms that constitute a particular chemical compound.

Front

What does a subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

What is the Law of Conservation of Mass?

Back

Matter cannot be created or destroyed in a chemical reaction.

Front

What is a reactant?

Back

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