Atomic Structure and The Periodic Table

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

  • Left a long gap along the top for them
  • Filled them in by predicting their properties
  • Left gaps
  • Nothing, he didn't think there would be any
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2. Which of these statements is true?

  • Protons have a mass of 1, neutrons 1, electrons 1/1836
  • Protons have a mass of 1, neutrons 1/1836, electrons 1
  • Protons have a mass of 1/1836, neutrons 1, electrons 1
  • They all have a mass of 1

3. Where are non-metals located in the modern Periodic Table?

  • Only on the bottom
  • To the left
  • To the right
  • Only on the top

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

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

5. In isotopes, are there odd numbers of electrons, protons or neutrons?

  • Neutrons
  • Electrons
  • Protons

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