Unit 4 _ Chemical Reactions TEST

Front

What happens to atoms during a chemical reaction?

Back

Atoms are rearranged to form new substances.

Front

What do the notations (s), (l), (g), and (aq) represent in a chemical reaction?

Back

(s) = solid, (l) = liquid, (g) = gas, (aq) = aqueous solution.

Front

What is the term for the small number in a chemical formula that indicates the number of atoms of an element?

Back

Subscript.

Front

What are the substances called that undergo change in a chemical reaction?

Back

Reactants.

Front

What must be balanced on both sides of a chemical equation for a reaction to be balanced?

Back

The number of atoms.

Front

What is a chemical reaction?

Back

A process where reactants transform into products through the rearrangement of atoms.

Front

What is the difference between reactants and products?

Back

Reactants are the starting substances, while products are the substances formed as a result of the reaction.

Front

What is a catalyst?

Back

A substance that speeds up a chemical reaction without being consumed in the process.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is a balanced chemical equation?

Back

An equation where the number of each type of atom is the same on both sides.