Explain the following giving an appropriate reason in each case.
(i) and both stabilize higher oxidation states of metals but exceeds in doing so.
(ii) Structures of Xenon fluorides cannot be explained by Valence Bond approach.
(i) This is due to the ability of oxygen to form multiple bonds to metals.
(ii)This is because the energy required for the promotion of electrons in Xenon is very high. Energy factor does not favour VB approach.