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  Mercury (element)

  Mercury, also called quicksilver, is a chemical element in the periodic table that has the symbol Hg and atomic number 80. A heavy, silvery, transition metal, mercury is one of five elements that are ... > more
• Wind Energy
  Energy and the Environment
  Renewable Energy
  Electricity
  Environmental Science
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  Wind turbine

  A wind turbine is a machine for converting the mechanical energy in wind into electrical energy. If the mechanical energy is used directly by machinery, such as a pump or grinding stones, the machine ... > more
• Ozone Holes
  Environmental Issues
  Air Quality
  Air Pollution
  Pollution
  Atmosphere
   
  

  Ozone

  Ozone (O3) is an allotrope of oxygen, the molecule consisting of three oxygen atoms instead of the more stable diatomic O2. Ozone is a powerful oxidizing agent. It is present in low concentrations ... > more
• Energy and the Environment
  Petroleum
  Renewable Energy
  Environmental Science
  Oil Spills
  Fossil Fuels
   
  

  Biodiesel

  Biodiesel refers to a diesel-equivalent, processed fuel derived from biological sources. Though derived from biological sources, it is a processed fuel that can be readily used in diesel-engined ... > more
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  Polonium

  Polonium is a chemical element in the periodic table that has the symbol Po and atomic number 84. A rare and highly radioactive metalloid, polonium is chemically similar to tellurium and bismuth, and ... > more
• Triglycerides
  Cholesterol
  Nutrition
  Obesity
  Diet and Weight Loss
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  Trans fat

  Trans fatty acids (commonly termed trans fats) are a type of unsaturated fat (and may be monounsaturated or polyunsaturated). Trans fats occur naturally, in small quantities, in meat and dairy ... > more
• Acid Rain
  Pollution
  Air Pollution
  Organic Chemistry
  Biochemistry
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  Acid

  An acid (often represented by the generic formula HA) is traditionally considered any chemical compound that, when dissolved in water, gives a solution with a pH of less than 7.0. That approximates ... > more
• Electronics
  Graphene
  Spintronics
  Spintronics Research
  Nanotechnology
  Sports Science
   
  

  Silicon

  Silicon is the chemical element in the periodic table that has the symbol Si and atomic number 14. A tetravalent metalloid, silicon is less reactive than its chemical analog carbon. It is the second ... > more
• Healthy Aging
  Attention Deficit Disorder
  Inorganic Chemistry
  Chemistry
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  Bismuth

  Bismuth is a chemical element in the periodic table that has the symbol Bi and atomic number 83. This heavy, brittle, white crystalline trivalent poor metal has a pink tinge and chemically resembles ... > more
• Sports Science
  Chemistry
  Inorganic Chemistry
  Spintronics
  Materials Science
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  Silver

  Silver is a chemical element with the symbol Ag. A soft white lustrous transition metal, it has the highest electrical and thermal conductivity of any metal and occurs in minerals and in free form. ... > more

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