5.5.1 - Common Valencies
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Practice Questions
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What is the valency of oxygen?
💡 Hint: Think about how many bonds oxygen can form.
Name a positive radical.
💡 Hint: It has a positive charge.
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Interactive Quizzes
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What is the valency of nitrogen?
💡 Hint: Think about how nitrogen bonds in compounds.
True or false: Radicals can only be positive.
💡 Hint: Consider examples of both cations and anions.
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Challenge Problems
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Write the formulas for ammonium sulfate (NH₄)₂SO₄ using the criss-cross method.
💡 Hint: Consider the valencies of ammonium and sulfate.
Explain why Na₂O is formed instead of NaO.
💡 Hint: Think about charge balance between the ions.
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