General Physical and Colloid Chemistry Key Points Quiz
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Questions and Answers

Who proposed the concept of atoms in the fifth century BC?

  • John Dalton
  • Selyutin Artem
  • Aristotle
  • Leucippus and Democritus (correct)

    • Which English schoolteacher proposed his atomic theory in 1807?

  • Aristotle
  • Democritus
  • John Dalton (correct)
  • Leucippus

    • What distinguishes the chemical elements from each other?

  • Number of protons (correct)
  • Kinetic-Molecular Theory
  • Number of neutrons
  • Atomic mass

    • What are forms of an element that have different numbers of neutrons called?

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

    What is the basic particle of the chemical elements?

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

    Which of the following statements best describes an ion?

    <p>An ion is a charged particle due to an unbalanced electron/proton numbers</p> Signup and view all the answers

    According to Dalton’s atomic theory, what does an element consist of?

    <p>An element consists of only one type of atom, which has a mass characteristic of the element and is the same for all atoms of that element</p> Signup and view all the answers

    What is the empirical formula of acetic acid?

    <p>C2H4O2</p> Signup and view all the answers

    What type of model can be used to represent a methane molecule with carbon and hydrogen atoms as spheres?

    <p>Ball-and-stick model</p> Signup and view all the answers

    How many copper atoms are approximately present in a pre-1982 copper penny?

    <p>$3 \times 10^{22}$</p> Signup and view all the answers

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