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Question

Among the following inert gas elements, the elements that show highest chemical reactivity is:
  1. Ne
  2. Ar
  3. He
  4. Xe

A
Ar
B
Ne
C
He
D
Xe
Solution
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Reactivity tends to increase down the periodic table (within groups) as the outermost electron becomes more remote/delocalized from the nucleus.

By this concept, Xenon is considered most reactive. Xenon compounds are reactive because the electrons are not strongly held, owing to the big size of Xenon.

Hence, the correct answer is option D.

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