Atomic Structure and The Periodic Table

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1. Which of these statements is true?

  • Protons have a positive charge, electrons negative, neutrons are neutral
  • Protons have a positive charge, neutrons negative, electrons neutral.
  • Electrons have a positive charge, neutrons neutral, protons positive
  • Neutrons have a positive charge, electrons negative, protons neutral
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2. 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

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

  • Protons
  • Neutrons
  • Electrons

4. What did Mendeleev do with elements of similar properties?

  • Nothing, he spread them out
  • Put them underneath each other
  • Put them next to each other
  • Cluster them in a group

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

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

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