Chemistry: Atoms, Molecules, and Conservation Laws

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Questions and Answers

According to Dalton’s Atomic Theory, what do chemical compounds consist of?

  • Atoms of the same element combining in variable ratios
  • Atoms of different elements combining in fixed ratios (correct)
  • Molecules of different elements combining in fixed ratios
  • Molecules of the same element combining in variable ratios

Who postulated the existence of electrons as the first subatomic particles?

  • Avogadro
  • Antoine Lavoisier
  • J.J. Thomson (correct)
  • John Dalton

What did Avogadro's Hypothesis state about equal volumes of different gases at the same temperature and pressure?

  • They have the same atomic weight
  • They have the same density
  • They contain the same mass
  • They contain the same number of particles (correct)

According to the Law of Conservation of Mass, what happens to mass during a chemical reaction?

<p>Mass is neither created nor destroyed (B)</p> Signup and view all the answers

What did Dalton's Atomic Theory state about atoms of different elements?

<p>They are different in some fundamental way or ways (B)</p> Signup and view all the answers

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