CHATHAM, NJ - Chatham High School chemistry students celebrated "Mole Day" by dying tee shirts in honor of the “mole,” a tradition at CHS for more than 25 years.

A “mole” is a basic unit of measure in chemistry. The “mole” is calculated using a formula discovered by Jean Baptiste Perrin (1870-1942), but named for Amadeo Avogadro (1776-1858), which is called “Avogadro’s Number” (6.02 x 1023). 

Chemistry students studied the concept of chemical bonding by tie-dying. Students wore the tee shirts on Tuesday, Nov. 4. Schools throughout the country participate in various activities to commemorate the discovery.