Final answer:
Atomic radii increase down a group and decrease across a period on the periodic table. The largest atoms are in the lower-left corner, while the smallest are in the upper right corner.
Explanation:
Atomic radii decrease from left to right across a period and increase from top to bottom down the groups. The largest atoms are found in the lower-left corner of the periodic table, while the smallest are in the upper right corner. For example, cesium (Cs) has one of the largest atomic radii among the elements.
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