Element   One of less than 118 pure chemical substances. An element is a substance composed of atoms with identical atomic number.

Used in the following modules: Absorption, Distribution and Storage of Chemicals, Atomic Theory I, Atomic Theory II, Cells, Chemical Bonding, Chemical Equations, Chemical Reactions, Data: Uncertainty, Error, and Confidence, Data: Using Graphs and Visual Data, DNA I, DNA II, Educational Web Design, Matter, Matter: States of Matter, Minerals II, Minerals III, Nuclear Chemistry, Organic Chemistry, Research Methods: Modeling, The Carbon Cycle, The Mole, The Nitrogen Cycle, The Periodic Table of Elements