Ed and Periodic Videos. The Elements Revealed: An Interactive Periodic Table. In the October 2011 issue of Scientific American, we celebrate the International Year of Chemistry. Learn more about its impact on our daily lives in our Special Report. UPDATED: 06/18/2013 In honor of the 2013 Lindau meeting, which focuses on chemistry, we have updated our interactive periodic table with links to Nature Chemistry's In Your Element essay series.
Each essay tells the story of a particular element, often describing its discovery, history and eventual uses. Main Sources & More to Explore: Games and Puzzles. Science Games Who Wants to Win $1,000,000?
- Answer 15 science and math based questions correctly and become a (pretend!) Make an Acid-Base Rainbow Wand. By Anne Marie Helmenstine, Ph.D.
An acid-base rainbow wand is an easy and colorful chemistry demonstration which illustrates the range of colors available for a pH indicator solution. Take a long glass tube and fill it with Universal Indicator solution. Add a few drops of 0.02M HCl to one end of the tube and seal it with a stopper. Add a couple of drops of 0.02M NaOH to the other end of the tube and seal it. The Universal Indicator will respond to the pH gradient by providing you with a lovely rainbow. Rainbow in a Glass Density Demonstration.