3. Fill in the following MO diagram for O2 a. What is the bond order? b. How many unpaired electrons are there? c. Is the molecule paramagnetic or diamagnetic?

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Title: Understanding Molecular Orbital (MO) Diagrams

**Session ID:** 53588886

**Multiple Choice Question:**

**Prompt:** Refer to the MO diagram for O₂ for question 3. What is the bond order (question a) for O₂ as calculated from the MO diagram?

**Options:**
- A. 1
- B. 2
- C. 3
- D. 4

**Features:**
- Navigation arrows for moving through questions.
- "Jump to" option for quick navigation to specific questions (1 to 10).
- Links provided:
  - **Send a message to the instructor**
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**Note:** This is a multiple choice question platform used for educational purposes by "learning catalytics" (Pearson). The MO diagram referred to in the question is not displayed here, but typically includes bonding and antibonding orbitals to determine bond order.
Transcribed Image Text:Title: Understanding Molecular Orbital (MO) Diagrams **Session ID:** 53588886 **Multiple Choice Question:** **Prompt:** Refer to the MO diagram for O₂ for question 3. What is the bond order (question a) for O₂ as calculated from the MO diagram? **Options:** - A. 1 - B. 2 - C. 3 - D. 4 **Features:** - Navigation arrows for moving through questions. - "Jump to" option for quick navigation to specific questions (1 to 10). - Links provided: - **Send a message to the instructor** - **Join another session** **Note:** This is a multiple choice question platform used for educational purposes by "learning catalytics" (Pearson). The MO diagram referred to in the question is not displayed here, but typically includes bonding and antibonding orbitals to determine bond order.
**Transcription and Explanation for Educational Purposes**

---

**3. Fill in the following MO diagram for O₂:**

a. What is the bond order?  
b. How many unpaired electrons are there?  
c. Is the molecule paramagnetic or diamagnetic?  

**Explanation of the MO Diagram:**

The diagram displays the molecular orbital (MO) energy levels for an O₂ molecule, arranged vertically to represent increasing energy. 

- **Energy Levels:**
  - Bottom to Top:
    1. **1s** orbitals
    2. **2s** orbitals
    3. **σ (sigma) 2s** bonding orbital
    4. **σ* (sigma star) 2s** antibonding orbital
    5. **σ 2p** bonding orbital
    6. **π 2p, π 2p** (two degenerate pi bonding orbitals)
    7. **π* 2p, π* 2p** (two degenerate pi antibonding orbitals)
    8. **σ* 2p** antibonding orbital

- **Important Observations:**
  - The MOs are filled according to the Aufbau principle, from lowest to highest energy.
  - The π (pi) 2p levels are degenerate, meaning they have the same energy.
  - The population of electrons follows Hund's rule, maximizing unpaired electrons before pairing.

**Additional Notes:**

- **Bond Order Calculation:** 
  - Bond order = (Number of bonding electrons - Number of antibonding electrons) / 2
  - This determines the strength and stability of the bond.
  
- **Magnetic Properties:**
  - **Paramagnetic:** Molecules with unpaired electrons are attracted to magnetic fields.
  - **Diamagnetic:** Molecules with all electrons paired are not attracted to magnetic fields.

This diagram is crucial for understanding the electronic structure and properties of oxygen molecules, including their reactivity and interactions with other substances.
Transcribed Image Text:**Transcription and Explanation for Educational Purposes** --- **3. Fill in the following MO diagram for O₂:** a. What is the bond order? b. How many unpaired electrons are there? c. Is the molecule paramagnetic or diamagnetic? **Explanation of the MO Diagram:** The diagram displays the molecular orbital (MO) energy levels for an O₂ molecule, arranged vertically to represent increasing energy. - **Energy Levels:** - Bottom to Top: 1. **1s** orbitals 2. **2s** orbitals 3. **σ (sigma) 2s** bonding orbital 4. **σ* (sigma star) 2s** antibonding orbital 5. **σ 2p** bonding orbital 6. **π 2p, π 2p** (two degenerate pi bonding orbitals) 7. **π* 2p, π* 2p** (two degenerate pi antibonding orbitals) 8. **σ* 2p** antibonding orbital - **Important Observations:** - The MOs are filled according to the Aufbau principle, from lowest to highest energy. - The π (pi) 2p levels are degenerate, meaning they have the same energy. - The population of electrons follows Hund's rule, maximizing unpaired electrons before pairing. **Additional Notes:** - **Bond Order Calculation:** - Bond order = (Number of bonding electrons - Number of antibonding electrons) / 2 - This determines the strength and stability of the bond. - **Magnetic Properties:** - **Paramagnetic:** Molecules with unpaired electrons are attracted to magnetic fields. - **Diamagnetic:** Molecules with all electrons paired are not attracted to magnetic fields. This diagram is crucial for understanding the electronic structure and properties of oxygen molecules, including their reactivity and interactions with other substances.
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