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3 cards from this section. Quick, good the night before a test.
What is the valency of oxygen?
Think about how many bonds oxygen can form.
Name a positive radical.
It has a positive charge.
What is the valency of nitrogen?
Think about how nitrogen bonds in compounds.
True or false: Radicals can only be positive.
Consider examples of both cations and anions.
Write the formulas for ammonium sulfate (NH₄)₂SO₄ using the criss-cross method.
Consider the valencies of ammonium and sulfate.
Explain why Na₂O is formed instead of NaO.
Think about charge balance between the ions.
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