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 chemicals compounds.

Answer

(i)All the filled orbitals of Xe have paired electrons.The promotions of one, two or three electrons from the 5p-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 least ionization enthalpy among noble gases and hence it readily forms chemical compounds particularly with `O_(2)` and `F_(2)`.