Which of the following is a halogen?A.Potassium (K)B.Iodine (I)C.Neon (Ne)D.Oxygen (O)

Step 1: Identify Halogens

Halogens are elements found in Group 17 of the periodic table. This group includes fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

Step 2: Analyze the Options

We need to evaluate each option given:

1. Potassium (K): This element is in Group 1 (alkali metals).
2. Iodine (I): This is in Group 17, making it a halogen.
3. Neon (Ne): This element is in Group 18 (noble gases).
4. Oxygen (O): This element is in Group 16 (chalcogens).

Step 3: Final Determination

Based on the group classifications, the only element listed that is a halogen is iodine (I).

Final Answer

B. Iodine (I) is a halogen.