The electronic structure of an atom of an element in Group 6 of the Periodic Table could be

  1. 1s² 2s² 2p²
  2. 1s² 2s² 2p⁴
  3. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s²
  4. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶

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Group 6 (Group 16) elements have six valence electrons. Oxygen has the configuration 1s² 2s² 2p⁴.
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