Final answer:
Xenon (Xe) has the largest atomic radius among the given elements because atomic size increases as you move down a group in the periodic table, and xenon is located further down the group than neon (Ne), argon (Ar), and krypton (Kr).
Step-by-step explanation:
The atomic radius is an important atomic property measured as the distance from an atom's nucleus to the outermost electron shell. It is important to note that atomic radii tend to decrease across a period (from left to right on the periodic table) and increase down a group (from top to bottom on the periodic table). Given that the options listed are noble gases and are located in the same group but different periods, the atomic radii increase as you move from the top to the bottom of the group. Therefore, among the elements given (Ne, Ar, Kr, Xe), the element with the largest atomic radius would be xenon (Xe) because it is the furthest down the group.