d' block elements shows variable oxidation states Why.

3d-series elements exhibit variable oxidation states. Why ?

Give reason: i) Actinoid contraction is greater from element to element. ii) Actinoids show variable oxidation states.

3d-series elements exhibit vaiable oxidation states. Why ?

Give reason: Transition elements exhibit variable oxidation states.

(a) Transition metals show variable oxidation states. Explain. (b) Which metal of 3d-series exhibit maximum number of oxidation state?

Give reasons: (i) Zirconium (Z = 40) and Hafnium (Z = 72) have almost similar atomic radii. (ii) d-block elements exhibit more oxidation states than f-block elements. (iii) The enthalpies of atomization of the transition metals are high (iv) The variation in oxidation states of transition metals is of different type from that of the non transition metals. (v) Orange solution of potassium dichromate turns yellow on adding sodium hydroxide to it.

Name one 3d series element that do not show variable oxidation state.

Transition elements exhibit variable oxidation states.

Give general oxidation state of actinoids. Why actinoids shows variable oxidation states?