Detect analogy : Chlorine : Fluorine : Iodine
- A. These are names of inert gases.
- B. These are gases at room temperature.
- C. These are transition elements.
- D. These are halogens.
Explanation
Chlorine, fluorine, and iodine belong to Group 17 of the periodic table, known as the halogens. They are not all gases at room temperature, since iodine is a solid.
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