Elements
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Questions and Answers

Which one of these is true about compounds?

  • They have the same properties as their constituent elements
  • They can be broken down into other substances by chemical reactions
  • They are made up of two or more elements in a fixed ratio (correct)
  • They are only found in living organisms

    • Which one of these elements is required in very minute quantities?

  • Carbon
  • Oxygen
  • Fluorine (correct)
  • Calcium

    • Which element makes up the largest percentage of the human body by weight?

  • Carbon
  • Hydrogen
  • Oxygen (correct)
  • Nitrogen

    • Which one of these elements is not mentioned as a trace element in the human body?

    <p>Sulfur</p> Signup and view all the answers

    Which one of these is true about species and toxic elements?

    <p>Species can evolve or adapt to environments containing toxic elements</p> Signup and view all the answers

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