4.1.5 - Limitations of the Octet Rule
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Practice Questions
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What is meant by 'incomplete octet'?
💡 Hint: Think of elements with fewer than four valence electrons.
Name two examples of odd-electron molecules.
💡 Hint: Consider molecules with an uneven number of total electrons.
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Interactive Quizzes
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What is an incomplete octet?
💡 Hint: Think about which elements can form stable compounds without completing the octet.
True or False: Expanded octets are only seen in the second period elements.
💡 Hint: Consider which elements can use d-orbitals.
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Challenge Problems
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Discuss how the limitation of the octet rule impacts the prediction of molecular stability in nitrogen oxides.
💡 Hint: Think about how each of the oxygen states might differ.
Many heavy elements reveal expanded octets; describe a scenario in coordination chemistry where this is relevant.
💡 Hint: Focus on the geometry of the complexes formed.
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