Here's why:
* Halogens are a group of nonmetals located in Group 17 (VIIa) of the periodic table.
* Chlorine (Cl) and Iodine (I) are both members of the halogen group.
* Other halogens include fluorine (F), bromine (Br), and astatine (At).
Key characteristics of halogens:
* Highly reactive: They readily react with metals to form salts.
* Exist as diatomic molecules: They exist in their elemental state as pairs of atoms (e.g., Cl2, I2).
* Have seven valence electrons: This gives them a strong tendency to gain one electron to achieve a stable octet.
* Varying states of matter: Fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid at room temperature.
