Exit Ticket · Grade 10 · Science · ngss
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Q1. During today's reading, you learned about early attempts to organize the elements. Describe one limitation of Döbereiner's triads or Newlands' Law of Octaves that made it necessary for scientists to develop a better system.
Q2. Based on the notes from today's lesson, explain how Mendeleev used patterns in atomic mass and element properties to predict the existence of undiscovered elements. What does this tell us about the reliability of his data-driven approach?
Q3. Today's discussion covered how the modern periodic table differs from Mendeleev's original version. Analyze one specific change — such as the shift to organizing by atomic number instead of atomic mass — and explain what new evidence or data led scientists to make that change.
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