Chemistry OCR 1.2.4 Electrons and the Periodic Table

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1. What is the relationship between the 4s sub-shell and the 3d sub-shell?

  • the 4s sub-shell has a lower energy level then the 3d sub-shell
  • they have no relationship
  • the 4s sub-shell has equal energy level to the 3d sub-shell
  • the 3d sub-shell has a lower energy than the 4s sub-shell
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2. When negative ions are formed, what happens to the electrons in the highest energy orbitals?

  • electrons are added
  • the number of electrons is doubled
  • electrons are removed
  • the number of electrons stays the same

3. What is the electronic configuration of Potassium, K?

  • 1s^2 2s^2 2p^6 3s^2 3p^6 4s^4
  • (^ indicates a subscript) 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1
  • 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2
  • 1s^2 2s^2 3s^2 3p^6 4s^1

4. The Periodic Table is structured in blocks of 2,6,10 and 14 elements, linked to....

  • sub-shells
  • orbitals
  • shells
  • atoms

5. How can the electronic configuration be abbreviated?

  • to show the last half of its electronic configuration
  • to show just the inner shell of the element
  • to show just the outer shell of the element
  • it can not be abbreviated


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