Atomic Structure and The Periodic Table

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1. What did Mendeleev do with elements that hadn't been discovered?

  • Left gaps
  • Filled them in by predicting their properties
  • Nothing, he didn't think there would be any
  • Left a long gap along the top for them
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2. In which year did Mendeleev arrange the elements into a Periodic Table?

  • 1896
  • 1869
  • 1986
  • 1689

3. Which of these statements is true?

  • Neutrons have a positive charge, electrons negative, protons neutral
  • Protons have a positive charge, neutrons negative, electrons neutral.
  • Protons have a positive charge, electrons negative, neutrons are neutral
  • Electrons have a positive charge, neutrons neutral, protons positive

4. In the modern periodic table, how are elements arranged?

  • Increasing atomic number
  • Decreasing atomic mass
  • Increasing atomic mass
  • Decreasing atomic number

5. Where are the protons and neutrons found in an atom?

  • Alongside the electrons
  • Nucleus
  • Surrounding the electrons
  • Energy shells
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