chemical reaction

Single Replacement Reaction

A chemical change in which one element replaces a second element in a compound.

Double Replacement Reaction

A chemical change involving an exchange of positive ions between two compounds.

Combustion Reaction

A chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat and light.

Reaction Rate

A measure of how rapidly a reaction takes place

Subscript

A number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound.

Coefficient

A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.

Decomposition Reaction

A reaction in which a single compound breaks down to form two or more simpler substances.

Endothermic Reaction

A reaction in which energy is absorbed.

Synthesis Reaction

A reaction in which two or more substances combine to form a new compound.

Exothermic Reaction

A reaction that releases energy in the form of heat.

Chemical Equation

A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products.

Reactants

A starting material in a chemical reaction.

Products

Ending materials in a chemical reaction.

Chemical Energy

Energy stored in chemical bonds.

Catalyst

Something that brings about a change in something else.