(i) Write the reason for the anomalous behaviour of Nitrogen. (ii) Mn^(2+) is more stable than Mn^(4+).Why ?

(i) Write the reason for the anomalous behaviour of Nitrogen. (ii) Mn

1.	(i) Write the reason for the anomalous behaviour of Nitrogen. (ii) Mn^(2+) is more stable than Mn^(4+).Why ?
Answer» SOLUTION :(i) 1, Due to its small size, high electro negativity, high ionisation enthalpy enthalpy and absence of d-orbitals. 2. `N_(2)` hasa unique ability to form `p pi-p pi` multiple bond whereas the HEAVIER members of this group (15) do not form `p pi-p pi` bond, because their atomic orbitals are so large and diffused that they cannot have effective overlapping. 3. Nitrogen EXISTS a diatomic molecule with triple bond between the two atoms whereas otherelements form singlebond inthe elementalstate. 4. N cannot form `d pi-p pi`bonddue to the absence of d-orbitals whereas other elements can. (II) The relative stability of different oxidation statesof 3d metals iscorrelatedwith theextra stability of half-filled and fully filledelectronic configurations. Example: `Mn^(2+)(3d^(5))` is more stable than `Mn^(4+)(3d^(3))`