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Checking an Oxygen Bond After Electrons Enter 4 questions
Checking an Oxygen Bond After Electrons Enter
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A classroom display compares three particles that each contain two oxygen atoms. The models differ in how many electrons the pair contains. The display gives rounded bond lengths and marks a lower bond order as a weaker link between the atoms.
| Particle | Extra electrons relative to neutral O2 | Model O–O length (pm) | Model bond order |
|---|---|---|---|
| O2 | 0 | 121 | 2 |
| O2- | 1 | 133 | 1.5 |
| O22- | 2 | 149 | 1 |
Question 1
Which model has the longest O–O bond?
- O₂ only
- O₂⁻ only
- O₂²⁻ only
- All are the same.
Question 2
Explain what changes and what stays the same when one electron is added to neutral O₂ in this model.
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A detector reports 149 pm for a particle in the display, but another readout assigns it just one extra electron. Assume the particle must fit one row of the table.
Question 3
Explain why the two readouts cannot both identify the same row.
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Question 4
Draw neutral O₂ and O₂²⁻ using lines for their bonds. Label the net charge of each whole particle.
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