Why `Mn^(2+)` compounds are more stable than `Fe^(2+)` compounds towards oxidation to their + 3 state ?

(i) Why do lanthanoids have very similar chemical reactivity? (ii) Why are Mn^(2+) compounds more stable than Fe^(2+) compounds towards oxidation to their +3 oxidation slales?

Fe^(3+) compounds are more stable than Fe^(2+) compounds because

(a). Why Mn^(2+) compounds are more stable than Fe^(2+) towards oxidation to their +3 state? (b). Calculate the magnetic moment of V^(3+) ion. (c). [Ti(H_2O)_6_^(3+) gives violet coloured aqueous solution but [Mg(H_2O)_6]^(2+) solution is colourless. (d). [Ti(H_2O)_6]^(3+) is coloured whereas [Sc(H_2O)_6]^(3+) is colourless. Why?

(a) Why are Mn^(2+) compounds more stable than Fe^(2+) towards oxidation to their +3 state. (b) What are interstitial compounds ? Why are such compounds well-known for transition metals ? (c ) Write electronic configuration of Pm^(3+)

Why arre Mn^(2+) compounds more stable than Fe^(2+) toward oxidation to their +3 state?

Why are Mn^(2+) compounds more stable than Fe^(2+) toward oxidation to their +3 state?