How does atomic radius change down a group of the periodic table?
Answer and explanation
Correct answer: D. It increases because extra electron shells are added
- Step 1: Each period down adds a new principal shell. Step 2. The extra shell outweighs the rising nuclear charge, so the radius grows. Answer: It increases because extra electron shells are added. Why not the others: Rising nuclear charge explains the trend across a period, not down a group.
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