alleryHow does the size of a cation compare with its parent atom?
ACation has no size
BCation is larger
CThey are equal
DCation is smaller
Answer & Solution
Correct answer: D. Cation is smaller
1. A cation forms when an atom loses one or more electrons.
2. Loss of an outer electron may remove the outermost shell entirely.
3. The remaining electron cloud is pulled in by the unchanged nuclear charge.
4. So the cation is smaller than the neutral parent atom.
5. For example, Na+ is much smaller than Na.
_Source: syllabus Science Ch 5 'Periodic Classification of Elements'_
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