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Period 2 vs Period 3: Atomic Radius and Ionization Trends (11–20 focus): Type-in
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- 01Comparing elements with atomic numbers 11 (Na) and 19 (K), which has the larger atomic radius?
- 02Which has a higher first ionization energy: chlorine (Cl) or argon (Ar)?
- 03Between phosphorus (P) and sulfur (S) in Period 3, which element has the higher first ionization energy?
- 04Which has the higher first ionization energy: potassium (K, Z=19) or calcium (Ca, Z=20)?
- 05Which has the higher first ionization energy: magnesium (Mg, Z=12) or aluminum (Al, Z=13)?
- 06What is the general trend in first ionization energy across a period (left to right) for Periods 2 and 3 (note common exceptions may occur)?
- 07In Period 3 (elements 11–18), which element has the smallest atomic radius?
- 08In Period 3 (elements 11–18), which element has the largest atomic radius?
- 09What is the general trend in atomic radius across a period (left to right) for Periods 2 and 3?
- 10Which of these Period 3 elements has the largest atomic radius: Na, Mg, or Al?