Exercise

Europium and ytterbium behave as good reducing agents in $+2$ oxidation state, explain.

Explain the trends in ionisation enthalpies of $\mathrm{d}$-block elements.

Why nobelium is the only actinoid with $+2$ oxidation state?

Although $\mathrm{Zr}$belongs to $4\mathrm{d}$ and $\mathrm{Hf}$belongs to$5\mathrm{d}$ transition series but it is quite difficult to separate them. Why?

Write the general properties of lanthanoids.

Describe the reactions involved in the preparation of ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ from chromite ore.

Which actinoid, other than uranium occur in significant amount naturally?

Which one of the following is diamagnetic?