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Give reasons : (i) Xenon does not form...

Give reasons :
(i) Xenon does not form fluorides such as `XeF_(3) and XeF_(5)`.
(ii) Out of noble gases, only xenon is known to form established chemical compounds.

Text Solution

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(i) All the filled orbitals of Xe have paired electrons. The promotion of one, two or three electrons from the 5p filled orbitals to the 5d-vacant, orbitals will give rise to two, four and six half-filled orbitals. So, Xe can combine with even but not odd number of F atoms. Hence, it cannot form `XeF_(3) and XeF_(5)`.
(ii) Except radon which is radioactive Xe has least ionization energy among noble gases and hence it readily forms chemical compounds particularly with `O_(2) and F_(2)`.
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