Chemistry 101
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Questions and Answers

Which of the following is NOT a characteristic of a chemical substance?

  • Homogeneity throughout the substance
  • Uniform distribution of chemical composition
  • Definite chemical composition
  • Ability to be broken down into different substances (correct)

    • Which elements are most abundant in cells?

  • Carbon, oxygen, and hydrogen
  • Hydrogen, nitrogen, and phosphorous
  • Carbon, nitrogen, and oxygen (correct)
  • Oxygen, phosphorous, and sulfur

    • What are trace elements?

  • Elements that are required in small amounts by living things (correct)
  • Elements that are required in equal amounts by living things
  • Elements that are required in large amounts by living things
  • Elements that are not required by living things

    • What is the smallest particle of an element called?

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

    What does the nucleus of an atom contain?

    <p>Protons and neutrons</p> Signup and view all the answers

    Which of the following best describes a chemical substance?

    <p>A material with a definite chemical composition that is found uniformly throughout</p> Signup and view all the answers

    Which of the following is an example of a trace element?

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

    Which elements are most abundant in cells?

    <p>Carbon, oxygen, hydrogen, nitrogen, phosphorous, and sulfur</p> Signup and view all the answers

    What is the smallest particle of an element called?

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

    What does the nucleus of an atom contain?

    <p>Both protons and neutrons</p> Signup and view all the answers

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