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1.
Rank the following elements by increasing atomic radius: carbon, oxygen,
aluminum, potassium
2. When a chlorine atom forms an ion its radius increases, but when a sodium
atom forms an ion its radius decreases. Explain this apparent contradiction.
3. What trend in atomic radius occurs down a group on the periodic table? What
causes this trend?
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Rank the following elements by increasing atomic radius: carbon, oxygen,
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