5.5.2 - Valency Rules for Compounds
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Practice Questions
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What is the valency of Hydrogen?
💡 Hint: Go back to the list of common valencies.
Calcium has a valency of ?
💡 Hint: Think of its position in the periodic table.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the valency of Oxygen?
💡 Hint: Refer back to the table of common valencies.
True or False: The criss-cross method can be used for all compounds.
💡 Hint: Think about the types of bonding.
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Challenge Problems
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If you have a solution that contains Aluminum with a valency of 3 and Oxygen with a valency of 2, write the formula for Aluminum Oxide.
💡 Hint: Remember to balance the charges when forming compounds.
How would you write the formula for a compound made of Potassium (valency 1) and Phosphate (valency 3)?
💡 Hint: Don’t forget that phosphate is a polyatomic ion!
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