- The periodic table is a chart used in chemistry that shows chemical elements in order of their atomic number.
An organized table of chemical elements such as oxygen and carbon is an example of the periodic table.
Used by arrangement with John Wiley & Sons, Inc.
periodic table - Medical Definition
periodic table - Science Definition
Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.