QQuestionChemistry
QuestionChemistry
How many valence electrons are in the oxygen peroxide ion O^2−(2)?
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Answer
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Step 1:I'll solve this step-by-step following the specified LaTeX formatting guidelines:
Step 2:: Determine the atomic number of oxygen
- Oxygen's atomic number is 8 - This means a neutral oxygen atom has 8 electrons
Step 3:: Identify the electron configuration of a neutral oxygen atom
- Electron configuration: $$1s^{2} 2s^{2} 2p^{4}
- Valence electrons in a neutral atom: 2s^{2} 2p^{4} = 6 electrons
Step 4:: Calculate electrons in the peroxide ion O^{2−}
- Total valence electrons: $$6 + 2 = 8$$ electrons
- The ion has a 2− charge, meaning it gains 2 additional electrons - Electrons added: 2
Step 5:: Verify the electron count
- Neutral oxygen atom: 6 valence electrons - Peroxide ion gains 2 electrons - Total valence electrons in O^{2−}: 8 electrons
Final Answer
The oxygen peroxide ion O^{2−} has 8 valence electrons.
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