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Question

What is the ground-state electron configuration for O2- ion?


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Solution

Oxygen:

  • Oxygen is a p-block element having an atomic number 8 and an atomic symbol O.
  • It belongs to Group-16 and the second period.

Electronic configuration of Oxygen:

  • The electronic configuration of Oxygen is 1s22s22p4.

Electronic configuration of O2- ion:

  • The oxygen atom gains two electrons and results in the formation of O2-ion.
  • The electronic configuration of O2- ion is 1s22s22p6.

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