Which is the most reactive halogen among the following ?

Options

A. Fluorine
B. Chlorine
C. Iodine
D. Bromine

Explanation

To determine which is the most reactive halogen among the given options, we can follow these steps:

### Step 1: Identify the Halogens
The halogens are a group of elements found in Group 17 of the periodic table. They include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).

### Step 2: Understand Reactivity in Halogens
Reactivity in halogens generally decreases as you move down the group in the periodic table. This is because the atomic size increases, and the ability to attract electrons (electronegativity) decreases.

### Step 3: Compare Electronegativity
Fluorine is the most electronegative element in the periodic table. This means it has a strong tendency to attract electrons, making it highly reactive.

### Step 4: Consider Atomic Size
Fluorine is also the smallest halogen, which allows it to effectively overlap with other atoms to form bonds. The small size of fluorine enables it to approach other atoms closely, facilitating chemical reactions.

### Step 5: Conclusion
Based on the above points, fluorine is the most reactive halogen. It can easily form compounds with various elements due to its high electronegativity and small atomic size.

### Final Answer
**Fluorine (F) is the most reactive halogen.**

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