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Anne Marie Helmenstine, Ph.D.

Updated Articles and Resources

By Anne Marie Helmenstine, Ph.D.

    Updated Articles and Resources
    • 10 Gold Facts Created: Monday, February 04, 2013 Updated: Thursday, July 24, 2014
      Get 10 interesting facts about the element and metal gold.
    • Can You Drink Rain Water? Created: Friday, October 11, 2013 Updated: Thursday, July 24, 2014
      Here's a look at whether or not it's safe to drink rain water, the risks, and ways to improve rain water quality to make it better to drink.
    • Liquid Elements Created: Wednesday, January 24, 2007 Updated: Thursday, July 24, 2014
      There are six chemical elements that can be liquids at normal temperatures and pressures. Can you name them?
    • How To Make a Safe Glowing Lava Lamp Created: Thursday, July 24, 2014 Updated: Thursday, July 24, 2014
      Make a safe glowing lava lamp using household ingredients.
    • Can You Drink Too Much Water If You Are Thirsty? Created: Thursday, July 24, 2014 Updated: Thursday, July 24, 2014
      When you are thirsty, you can drink a lot of water. Find out whether it is possible to drink too much.
    • What Is the pH of the Stomach? Created: Friday, June 03, 2011 Updated: Thursday, July 24, 2014
      Your stomach produces hydrochloric acid, so you would expect it to be acidic. Do you know just how low your stomach pH gets or whether the pH is constant? Here's a look at the chemistry of stomach pH.
    • How to Make Nitrous Oxide or Laughing Gas Created: Thursday, June 09, 2011 Updated: Thursday, July 24, 2014
      Nitrous oxide or laughing gas is one of the easiest gases to prepare in the chem lab or home lab. Here are instructions for synthesizing and collection nitrous oxide or laughing gas.
    • Magic Colored Milk Science Project Created: Wednesday, July 23, 2008 Updated: Thursday, July 24, 2014
      If you add food coloring to milk, not a whole lot happens, but it only takes one simple ingredient to turn the milk into a spinning color wheel. Here is what you do.
    • Metals Versus Nonmetals Created: Friday, October 29, 2010 Updated: Thursday, July 24, 2014
      Elements may be classified as either metals or nonmetals, based on their properties. Here's a look at the differences between the metals and nonmetals.
    • What Are the Differences Between Metals and Nonmetals? Created: Friday, April 06, 2012 Updated: Thursday, July 24, 2014
      Learn how to tell metals and nonmetals apart based on their properties.
    • July 25 Science History Created: Friday, July 24, 2009 Updated: Thursday, July 24, 2014
      Learn about the history of science by reading about the significant scientific events that took place on this day in history.
    • Elephant Toothpaste Chemistry Demonstration Created: Thursday, October 09, 2008 Updated: Wednesday, July 23, 2014
      The elephant toothpaste chemistry demonstration is a dramatic demo which produces copious amounts of steaming foam that sort of looks like the toothpaste an elephant might use. Here's how to set up this demonstration and a look at the reaction behind it.
    • How to Make Rock Candy Created: Saturday, May 17, 2008 Updated: Wednesday, July 23, 2014
      Rock candy is candy made by crystallizing sugar. You can grow sugar crystals yourself, plus add color and flavor to make rock candy that you can eat.
    • Modeling Clay Recipes Created: Friday, June 18, 2010 Updated: Wednesday, July 23, 2014
      There are several ways you can make homemade clay for modeling, making ornaments, and for other projects and crafts. Here are several clay recipes, including a refrigerator clay, a clay you bake to harden, one you coat for a glossy finish, and one that works up and stays pliable much like store-bought modeling clay.
    • alanyl Created: Wednesday, November 14, 2007 Updated: Wednesday, July 23, 2014
      alanyl chemical structure. Chemistry. Page 57.
    • ajmalan Created: Wednesday, November 14, 2007 Updated: Wednesday, July 23, 2014
      ajmalan chemical structure. Chemistry. Page 54.
    • akuammilan Created: Wednesday, November 14, 2007 Updated: Wednesday, July 23, 2014
      akuammilan chemical structure. Chemistry. Page 55.
    • arginyl Created: Wednesday, November 14, 2007 Updated: Wednesday, July 23, 2014
      arginyl chemical Structure. Chemistry. Page 87.
    • aminobutanoyl Created: Wednesday, November 14, 2007 Updated: Wednesday, July 23, 2014
      aminobutanoyl chemical structure. Page 78.
    • Amide Functional Group Created: Wednesday, October 10, 2007 Updated: Wednesday, July 23, 2014
      Amide Functional Group. Chemistry. Page 74.
    • Chemical Structures Starting with the Letter A Created: Tuesday, September 25, 2007 Updated: Wednesday, July 23, 2014
      Browse structures of molecules and ions that have names beginning with the letter A.
    • Adenosine Created: Monday, December 01, 2008 Updated: Wednesday, July 23, 2014
      Adenosine. Chemistry. Page 42.
    • Adenine Created: Monday, December 01, 2008 Updated: Wednesday, July 23, 2014
      Adenine. Chemistry. Page 40.
    • Adenosine Monophosphate (AMP) Created: Friday, November 14, 2008 Updated: Wednesday, July 23, 2014
      Adenosine Monophosphate (AMP). Chemistry. Page 44.
    • Aldosterone Created: Friday, November 14, 2008 Updated: Wednesday, July 23, 2014
      Aldosterone. Chemistry. Page 62.
    • Aflatoxin Created: Thursday, November 13, 2008 Updated: Wednesday, July 23, 2014
      Aflatoxin. Chemistry. Page 53.
    • Actin Created: Thursday, November 13, 2008 Updated: Wednesday, July 23, 2014
      Actin. Chemistry. Page 37.
    • Acetone Created: Sunday, May 25, 2008 Updated: Wednesday, July 23, 2014
      Acetone. Chemistry. Page 20.
    • Adrenaline Created: Wednesday, February 13, 2008 Updated: Wednesday, July 23, 2014
      Epinephrine or Adrenaline. Chemistry. Page 52.
    • Adenosine Triphosphate (ATP) Created: Wednesday, February 13, 2008 Updated: Wednesday, July 23, 2014
      Adenosine Triphosphate (ATP). Chemistry. Page 45.
    • Atisane Chemical Structure Created: Sunday, November 25, 2007 Updated: Wednesday, July 23, 2014
      Atisane Chemical Structure. Chemistry. Page 98.
    • Aristolane Chemical Structure Created: Sunday, November 25, 2007 Updated: Wednesday, July 23, 2014
      Aristolane Chemical Structure. Chemistry. Page 95.

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