Final answer:
The element with the largest atomic radius is Francium (Fr).
Step-by-step explanation:
The element with the largest atomic radius can be predicted by looking at the periodic table. Atomic radius generally decreases from left to right across a period and increases down a group. Therefore, to determine which element has the largest atomic radius, we need to identify the element that is located in the lower left corner of the periodic table.
From the given options, the element with the largest atomic radius is Francium (Fr). Francium is found at the bottom left corner of the periodic table and has the largest atomic radius among the listed elements.