Mole Day

Celebrated annually on October 23 from 6:02 a.m. to 6:02 p.m., Mole Day commemorates Avogadro's Number (6.02 x 1023), which is a basic measuring unit in chemistry. Find ways to celebrate this chemistry “holiday” with the links below.

Mole Day normally falls during National Chemistry Week—an annual event that unites Local Sections, businesses, schools, and individuals in communicating to their communities the importance of chemistry in every-day life.

  • Stuffed Mole Pattern
  • Make-a-Mole
  • Molennium Instructions & Pattern
    Students can sew their own stuffed mole and decorate it to create characters such as the “Mole-a Lisa”, “Santa Claws” Mole, and others. Several different instructions sheets are available.
  • Mole Day Activities and Links
    A Squidoo collection of ideas for Mole Day. Includes a countdown calendar to Mole Day 2012, links to Mole Day-related videos, places to purchase mole merchandise, food ideas, mole characters, and more.
  • Chemical Quantities Activities
    Collection of links, and pdf and Word documents related to moles and stoichiometry. Includes typical worksheets for calculating molar mass, moles/molecules/grams, as well as puzzles to cover these concepts.
  • Mole Day Coloring Page
    Black and white drawing of a mole to color with “Happy Mole Day!” at the bottom of the page.
  • Molar Whack Game
    Online game based on “Whack-a-Mole”. Players hit moles on the head to earn points equal to the molar mass of the element (represented by its periodic table symbol) that the mole is holding. Users will need to sit through a couple short advertisements.
  • National Mole Day Foundation
    The home page for the Foundation shares information about past Mole Day themes since 1991, Mole Day jokes, Mole Day history, and announces that the 2012 theme is “Molar Eclipse”.
  • Chemical & Engineering News Newscripts—Chemists’ Holiday
    The C&E News Newscripts feature highlighted Mole Day in 2011 with statistics to demonstrate how large Avogadro’s number is.
  • Chemical & Engineering News Editor's Page—Mole Day
    C&E News editor Rudy Baum focused on Mole Day and communicating chemistry in a 2006 editorial.
  • Celebrating Mole Day
    This PowerPoint presentation was shared at a 2008 conference and discusses celebrating Mole Day (as well at National Chemistry Week, Einstein’s birthday, and Amusement Park Physics Day). It shows Mole Day theme graphics and many ideas for celebrating Mole Day, including projects, t-shirts, and signs.
  • Mole Day Celebration
    A post in Carolina Biological Supply’s Teacher Resources section on Mole Day. Includes ideas for celebrating.
  • Chemical Quantities Lesson
    Teacher David Fansler outlines his coverage of the topic of chemical quantities in a 19-page document, including sample problems.
  • Unit Conversion Worksheets
    Teacher Ian Guch shares eight worksheets related to unit conversions, moles, molecules, grams, and molar mass.
  • The Mole—Its History and Use
    A short Visionlearning module briefly explains the history of the mole, and molar mass and molecular weight. Includes a seven-question quiz and additional links.