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Question

Which is the chemically most active element?

A
Fluorine
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B
Chlorine
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C
Bromine
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D
Iodine
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E
Astatine
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Solution

The correct option is A Fluorine
Fluorine is chemically the most active element, reacting with virtually every element. It even reacts with the noble gases at high temperatures and pressures. Fluorine has 7 valence electrons so, it only needs one more to complete the octet which it needs to be stable. Fluorine is most electronegative element. This makes it very easy for fluorine to bond with almost any other element.

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