Questions and Answers
What is the correct formula for copper (II) iodide?
CuI2
The total positive charge equals the total negative charge in ionic compounds.
True
Which of the following is NOT a covalent compound?
In general, covalent bonding can occur between which of the following?
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What is the correct formula for potassium nitride?
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What is the correct formula for barium phosphate?
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What results when two or more atoms share electrons equally?
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Which of the following is a molecular compound?
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Which of the following is NOT a molecular compound?
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Which of the following are covalent compounds? (Select all that apply)
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Which of the following is a molecular compound?
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Which elements will form a molecular compound?
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Which of the following is a molecular compound?
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Which of the following pairings usually forms molecular compounds?
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Study Notes
Ionic Compounds
- Copper (II) iodide consists of the Cu²⁺ cation and I⁻ anion, resulting in the formula CuI₂ for electrical neutrality.
- An ionic compound must balance total positive and negative charges for neutrality.
- Potassium nitride is formed from the K⁺ cation and N³⁻ anion, leading to the formula K₃N, achieved by three potassium ions offsetting one nitride ion's charge.
- Barium phosphate includes Ba²⁺ cations and PO₄³⁻ anions, resulting in the formula Ba₃(PO₄)₂, with three barium ions balancing two phosphate ions.
Covalent Compounds
- Covalent bonding typically occurs between two neutral atoms.
- Molecular compounds form when two or more atoms share electrons equally.
- Example of a molecular compound includes HF.
- Other molecular compounds identified are SO₂ and H₂O₂.
- Nonmetals (e.g., F and O) usually combine to form molecular compounds.
Definitions and Classifications
- Na₂O is not a covalent compound; it is classified as an ionic compound.
- SnSe₂ does not qualify as a molecular compound.
- Identifiable covalent compounds include CO₂ and CH₄.
- Molecular compounds are characteristic of nonmetal and nonmetal pairings.
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Description
Test your knowledge on ionic and molecular compounds with this quiz. Learn how to derive formulas from the charges of cations and anions. Perfect for chemistry students studying compound formation and ionic bonding.
