Final answer:
Cesium (Cs) has the largest atomic radius among the given elements, which include Li, F, O, C, and Cs, because it is positioned toward the bottom left corner of the periodic table, indicating a greater number of electron shells.
Step-by-step explanation:
Among the options given, which are Li (lithium), F (fluorine), O (oxygen), C (carbon), and Cs (cesium), the element with the largest atomic radius will generally be the one located towards the bottom and left on the periodic table. This is because atomic size increases as you move down a group due to additional electron shells, and it also increases as you move left across a period due to the decreasing effective nuclear charge.
In this case, cesium (Cs), located in the bottom left corner of the periodic table, has the largest atomic radius among the options provided. To compare, cesium has more electron shells than lithium, carbon, oxygen, and fluorine, resulting in a larger size due to more layers of electrons. Lithium comes next in size as it is also on the left side but higher up on the periodic table. Carbon, oxygen, and fluorine have smaller atomic radii as they are towards the right side of the periodic table. Therefore, the answer is cesium (Cs) because it is the largest due to its position in the periodic table.