Decribe the general trends in the following properties of the first sereis of the transition elements :
(i) Stability of + 2 Oxidation state
(ii) Formation of oxometal ions.

(a) Describe the general trends in the following properties of the first series of the transition elements: (i) Stability of +2 oxidation state (ii) Formation of oxometal ions (b) Assign reason for each of the following: (i) Transition elements exhibit variable oxidation states. (ii)Transition metal ions are usually coloured

Describe the general trends in the following properties of the elements in groups 13 and 14 (a) Atomic size (b) Ionisation enthalpy (c) Metallic character (d) Oxidation states (e) Nature of halides.

Describe the following about Boron family (Group 13) elements : Stability of oxidation states

Name the oxometal anions of the first series of the transition metals in which the metal exhibits the oxidation state equal to its group number.

Explain the following (a) Zr and Hf exhibit similar properties. (b) Most of the transition elements show large number of oxidation states.

In general, the Transition elements exhibit their highest oxidation states in their compounds with elements like:

Assign reasons for each of the following (i) Trasitiono elements exhibit variable oxidation sates. (ii) Transition metal ions are usually coloured.

(a) What happens when (i) Manganate ions (MnO_(4)^(2-)) undergoes disproportionation reaction in acidic medium ? (ii) Lanthanum is heated with Sulphur? (b) Explain the following trends in the properties of the members of the First series of transition elements: (i) E^(@) (M^(2+)//M) value for copper is positive (+ 0.34 V) in contrast to the other members of the series. (ii) Cr^(2+) is reducing while Mn^(3+) is oxidising, though both have d^(4) configuration. (iii) The oxidising power in the series increases in the order VO_(2)^(+) lt Cr_(2)O_(7)^(2-) lt MnO_94)^(-) .

Give reason: (i) Transition metals show variable oxidation states. (ii) Actinoids show wide range of oxidation states.

To what extent do the electronic configurations, decide the stability of oxidation states in the first series of the transition elements? Illustrate your answer with examples.