Final answer:
Among the given options, Cl⁻ (chloride anion) represents the largest atomic radius due to atomic radius trends on the periodic table and the impact of additional electrons in anions.
Step-by-step explanation:
The question pertains to atomic radius, specifically which ion or atom among the options provided has the largest atomic radius. Atomic radius tends to increase as one moves down a group and decreases across a period from left to right on the periodic table. By considering these trends, the largest atomic radius among the options would be for the chloride anion (Cl⁻). This is because anions generally have a larger radius than their neutral atoms due to the addition of electrons and the subsequent increase in electron-electron repulsion, which leads to a larger radius.
Furthermore, chlorine is located to the left of fluorine in the periodic table, meaning it will naturally have a larger atomic radius than fluorine or its anion (F⁻). Hence, Cl⁻ represents the largest atomic radius among the options given.