Final answer:
Iodine (I) is the element that chemically reacts in a way similar to chlorine (Cl) because both are members of the halogen group in the periodic table, with similar electronic configurations leading to similar reactivity patterns.
Step-by-step explanation:
The element that reacts chemically in a way similar to chlorine (Cl) is iodine (I). Chlorine is a member of the halogen group—elements found in group 17 of the periodic table, which also includes fluorine, bromine, and iodine. Halogens have similar properties because they all have seven electrons in their outermost shell, leading to similar reactivity patterns.
Both chlorine and iodine tend to gain one electron to achieve a full outer shell, creating an anion with a charge of -1. This is demonstrated in the reaction of halogens with metals, where they form salts, such as sodium chloride (NaCl) and sodium iodide (NaI).
Elements like xenon (Xe), a noble gas, silicon (Si), a metalloid, and oxygen (O), a non-metal that's part of the chalcogen group, do not share similar chemical properties with halogens. Iodine (I), being in the same group as chlorine, exhibits the closest chemical behavior to it.