Your Safer Source for Science

Since 1977

Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax 866-452-1436

Did you ever wonder why most common metals are silver in color except copper and gold? Why does copper have a reddish color and gold have a yellowish color? Is your curiosity piqued? Read on!


  • Reflection
  • Absorption
  • Electron Configuration
  • Electron Orbital Theory