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During change of O(2) to O(2)^(2-) ion, ...

During change of `O_(2)` to `O_(2)^(2-)` ion, the electrons add on which of the following orbitals ?

A

`pi" orbital"`

B

`sigma^(**)" orbital"`

C

`sigma" orbital"`

D

`pi^(**)" orbital"`

Text Solution

AI Generated Solution

The correct Answer is:
To determine the orbitals in which electrons are added during the conversion of \( O_2 \) to \( O_2^{2-} \), we can follow these steps: ### Step 1: Understand the Molecular Orbital Configuration of \( O_2 \) The molecular orbital configuration for \( O_2 \) can be derived from the atomic orbitals of two oxygen atoms. The electron configuration of a single oxygen atom is \( 1s^2 2s^2 2p^4 \). For \( O_2 \), the total number of electrons is 16 (8 from each oxygen atom). ### Step 2: Fill the Molecular Orbitals The molecular orbitals are filled in the following order: 1. \( \sigma_{1s} \) (2 electrons) 2. \( \sigma_{1s}^* \) (0 electrons) 3. \( \sigma_{2s} \) (2 electrons) 4. \( \sigma_{2s}^* \) (0 electrons) 5. \( \sigma_{2p_z} \) (2 electrons) 6. \( \pi_{2p_x} \) (2 electrons) 7. \( \pi_{2p_y} \) (2 electrons) 8. \( \pi_{2p_x}^* \) (0 electrons) 9. \( \pi_{2p_y}^* \) (0 electrons) 10. \( \sigma_{2p_z}^* \) (0 electrons) The configuration for \( O_2 \) is: \[ \sigma_{1s}^2 \sigma_{1s}^*0 \sigma_{2s}^2 \sigma_{2s}^*0 \sigma_{2p_z}^2 \pi_{2p_x}^2 \pi_{2p_y}^2 \pi_{2p_x}^*0 \pi_{2p_y}^*0 \] ### Step 3: Determine the Configuration for \( O_2^{2-} \) When \( O_2 \) gains two additional electrons to become \( O_2^{2-} \), these electrons will occupy the lowest unoccupied molecular orbitals. The lowest unoccupied orbitals are \( \pi_{2p_x}^* \) and \( \pi_{2p_y}^* \). ### Step 4: Fill the Additional Electrons The two additional electrons will fill the \( \pi_{2p_x}^* \) and \( \pi_{2p_y}^* \) orbitals: - \( \pi_{2p_x}^* \) (1 electron) - \( \pi_{2p_y}^* \) (1 electron) ### Conclusion Thus, the electrons are added to the \( \pi^* \) orbitals, specifically \( \pi_{2p_x}^* \) and \( \pi_{2p_y}^* \). Therefore, the answer to the question is: **The electrons add to the \( \pi^* \) orbitals.** ### Final Answer The correct option is **Pi star orbital**. ---
To determine the orbitals in which electrons are added during the conversion of \( O_2 \) to \( O_2^{2-} \), we can follow these steps: ### Step 1: Understand the Molecular Orbital Configuration of \( O_2 \) The molecular orbital configuration for \( O_2 \) can be derived from the atomic orbitals of two oxygen atoms. The electron configuration of a single oxygen atom is \( 1s^2 2s^2 2p^4 \). For \( O_2 \), the total number of electrons is 16 (8 from each oxygen atom). ### Step 2: Fill the Molecular Orbitals The molecular orbitals are filled in the following order: 1. \( \sigma_{1s} \) (2 electrons) ...
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