Chemistry quiz.

is the process in which atoms are rearranged to produce new substances.

• Chemical reactions

• Chemical formula

• Chemical equation

uses chemical symbols and numbers to represent a given substance.

• Chemical reactions

• Chemical formula

• Chemical equation

___ in a chemical formula tell you what elements make up a substance.

• Chemical reactions

• Chemical equation

• Chemical symbol

The numbers written below and to the right of chemical symbols are called

• Reactants

• Subscripts

• Products

___is an expression that uses symbols to show the relationship between the starting substances and the substances that are produced by a chemical reaction.

• Chemical equation

• Chemical formula

• Chemical symbol

__are the substances that participate in a chemical reaction. Their chemical formulas are written on the left.

• Reactants

• Products

• Chemical symbols

___are the substances formed in a reaction. Their chemical formulas are written on the right.

• Reactants

• Products

• Chemical symbols

An arrow known as a sign points from reactants to products.

• Subscripts

• Yields

• Precipitate

The ___states that matter is neither created nor destroyed in ordinary

physical and chemical changes.

• Law of conservation of mass

• Law of conservation of energy

When writing a chemical equation, you must be sure that the reactants and products contain different number of atoms of each element. This is called balancing the equation

• True

• False