" 6.What is lanthanoid contraction? "

Give reasons: What is lanthanoid contraction?

What are lanthanoids? Give their general electronic configurations. What is lanthanoid contraction?

(a) What is lanthanoid contraction? What is the cause of lanthanoid contraction? (b) Explain whether Cu^(2+) is paramagnetic or diamagnetic.

Give reason: (a) What is lanthanoid contraction? (b) Which is the general oxidation state shown by actinoids?

Assign reasons for the following: What is lanthanoid contraction ? Explain its any one consequence.

(i) Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element. (ii) What is lanthanoid contraction? Name an important alloy which contains some of the lanthanoid metals.

(a) How would you account for the following : (i) Cobalt (II) is stable in aqueous solution but in the presence of strong ligands, it is easily oxidised. (ii) The transition metals form interstitial compounds. (iii) Silver halides find use in photography. (b) What is lanthanoid contraction ? Mention its main consequences.

What is lanthanoid contraction? Accound for such contraction.

What is lanthanoid contraction? What are the consequences of lanthanold contraction?