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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. |
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Answer» Solution :(i) All the FILLED orbitals of Xe have paired electrons. The promotion of one, two or three electrons from the 5 p-filled orbitals to the 5 d-vacant orbitals will give rise to two, four and six half-filled orbitals respectively. 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 lowest ionization enthalpy among noble GASES and hence it readily forms chemical compound with strong oxidising agents such as `O_(2) and F_(2)`. |
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