Unit 2: Structure 2: Models of Bonding and Structure
Topic 2.1: The Ionic Model Questions
Practice 6 exam-style questions for IB Chemistry Topic 2.1. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Deduce2 marks
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An atom of element Q has the electron configuration 2, 8, 8, 1.
Deduce the formula of the ion that Q usually forms, and explain your reasoning. [2]
Deduce the formula of the ion that Q usually forms, and explain your reasoning. [2]
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Unlock Question2Deduce1 mark
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Deduce the formula of the ionic compound formed between potassium ions, K⁺, and sulfide ions, S²⁻. [1]
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Unlock Question3Describe3 marks
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Describe how the ions in calcium fluoride, CaF2, are formed and explain what holds the ions together. [3]
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Unlock Question4Deduce1 mark
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Deduce the formula of iron(III) hydroxide, formed from Fe³⁺ ions and hydroxide ions, OH⁻. [1]
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Unlock Question5Explain3 marks
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Sodium chloride is an ionic compound.
Explain why it has a high melting point and why it conducts electricity when molten but not when solid. [3]
Explain why it has a high melting point and why it conducts electricity when molten but not when solid. [3]
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Unlock Question6Explain2 marks
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Explain why an ionic crystal such as sodium chloride is brittle and shatters when it is hit. [2]
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