Practice Ionic Radius (3.7.1.b) - Classification of Elements and Periodicity in Properties

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6 sample questions

Question 1.
What is an ionic radius?
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Think about the size of an ion in relation to its atom.
Question 2.
How does a cation differ in size from its parent atom?
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Consider electron loss and nuclear charge.
3Question 3.
What happens to the ionic radius when an atom becomes a cation?
- It increases
- It decreases
- It remains the same
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Think about the number of electrons lost.
4Question 4.
True or False: Anions are always larger than their parent atoms.
- True
- False
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Consider the effects of gaining electrons.
Question 5.
Explain why the ionic radius of Ca²⁺ is smaller than that of K⁺ even though both have the same number of electrons.
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Consider how charge affects size in isoelectronic species.
Question 6.
Determine which has a greater ionic radius: Br⁻ or I⁻ and explain your reasoning.
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Think about periodic trends in ionic size.

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