Write the balanced chemical equations for the following reactions:

OR

Give reasons for the following:

(a) Xenon does not form fluorides such as XeF₃ and XeF₅.

(b) Out of noble gases, only Xenon is known to form real chemical compounds.

They react to simply form an adduct.

OR

(a) Xenon has a fully filled outer orbital (5s² 5p⁶ ). These electrons unpair and expand into the d-orbital to form bonds with fluorine. If xenon bonds with odd(3,5) number of fluorine, there will be an electron left unpaired which leads to instability of the compound. Hence XeF₃ and XeF₅ are not formed.

(b) Xenon occupies the last place in 5^th period. It has a completed octate(5s² 5p⁶) but a vacant 5d orbital. Compared to other noble gases the size of xenon atom is also big, due to its size ,the outermost electrons are far away from the nucleus and shielded from nuclear attraction by the inner electrons. Hence these outer electrons can unpair and jump to empty 5d orbitals in presence of highly electro negative atom like fluorine to form covalent bonds, resulting in stable compounds.