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• What is the modern periodic table?

  A tabular arrangement of chemical elements
• Who first published a recognizable periodic table?

  Dmitri Mendeleev
• What was the significance of Mendeleev's predictions?

  They matched newly-discovered elements later
• What were the objectives of the module on early ideas about atoms?

  1. Compare and contrast Ancient Greeks' ideas on atoms
  2. Describe Ancient Greeks' ideas on elements
  3. Explain contributions of alchemists to Chemistry
• Who are credited with the concept of indivisible matter?

  Leucippus and Democritus
• What did Democritus believe about atoms?

  Atoms differ in size and shape
• How did Democritus explain the cutting of a stone?

  It eventually yields indivisible atoms
• How did Aristotle's theory differ from Democritus' theory?

  Aristotle believed in four elements
• What did Robert Boyle articulate in 1662?

  Boyle's Law
• What does Boyle's Law state?

  Volume of gas decreases as pressure increases
• What is the law of conservation of mass?

  Mass is neither created nor destroyed
• What did Antoine Lavoisier prove about burning substances?

  No net gain or loss of weight occurs
• Who debunked the beliefs of Ancient Greeks on matter?

  John Dalton
• What did Dalton's experiments prove?

  The existence of atoms
• What did Joseph Louis Proust discover about compounds?

  They contain elements in definite proportions
• What is alchemy and its significance?

  • Investigation of nature and early chemistry
  • Combined chemistry and metal work
  • Influenced the evolution of modern science
• Where did alchemy start in the East?

  India and China
• How did alchemy evolve in the West?

  From Egyptian metallurgy in the fourth millennium BCE
• What role did Jabir Ibn Hayyan play in alchemy?

  He became a royal alchemist in Baghdad
• What compounds did Jabir mention in his writings?

  Corrosive sublimate and silver nitrate
• What did Paracelsus believe about the body's organs?

  They worked as purifiers of substances
• What is the "tria prima" according to Paracelsus?

  The balance of mercury, sulfur, and salt
• What was Democritus' unusual theory about the universe's origin?

  It arose from the nature of atoms
• How does modern atomic theory differ from early Atomists?

  Atoms are mostly void with a dense center
• What are the key historical developments in atomic theory?

  • Democritus proposed indivisible atoms
  • Aristotle introduced four elements theory
  • Boyle articulated Boyle's Law
  • Lavoisier established conservation of mass
  • Dalton proved existence of atoms
  • Proust formulated law of definite proportions