Which element has the largest atomic radius?
Answer and explanation
Correct answer: C. Cesium
- Step 1: Atomic radius increases down a group. Step 2. Cesium is the lowest of the metals listed, so its atoms are the largest. Answer: cesium. Why not the others: Sodium, lithium, and potassium lie above cesium in Group 1, possessing fewer occupied electron shells and higher effective nuclear charges that keep their atomic radii smaller.
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