Conjugated π Systems and Aromaticity

Often compounds with extended conjugated systems, a ________ is a material that changes the color of light it reflects as the result of selective color absorption.

One 1 2 3 4 5 6 7 8 9
Two 10 11 12 13 14
Three 15 16 17 18 19
Four 20 21 22 23 24 25
  
Physics
Chemistry
Organic Chemistry
Biology