Question

arrange iodine, fluorine, bromine, chlorine in decreasing order of there reactivity.

Answer 1

1 fluorine
2 chlorine
3 bromine
4 iodine
in decreasing order

Answer 2

According to the decreasing order of there reactivity, the given elements are arranged as Fluorine, Chlorine, Bromine, and Iodine.

Explanation:

• The given elements such as Iodine, Fluorine, bromine, and Iodine are called halogens and they belong to group 17 of the periodic table.
• The exact order of halogen is as follows:

1. Fluorine
2. Chlorine
3. Bromine
4. Iodine
5. Astatine

• When we move down the group the atomic radius increases due to which the ability of the atom of the element to hold incoming electron decreases.
• Due to this, the reactivity ability of halogen decrease down the group. Thus fluorine is highly reactive whereas Astatine is the least reactive.
• Thus the correct order of elements in decreasing order of their reactivity are as follows:

Fluorine>Chlorine>Bromine>Iodine.

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