Properties of Actinoids

Describe the Ionization Energies of Actinoids.

${\mathrm{U}}^{3+}$ is a diamagnetic trivalent actinoid ion.

Identify the paramagnetic ion(s) from the given trivalent actinoids.

Identify the diamagnetic ion from the given trivalent actinoids.

Discuss the magnetic nature of the trivalent actinoids.

The colour is due to electronic transition within the $5\mathrm{f}$ levels.

${\mathrm{Pu}}^{3+}$ shows pink colour.

${\mathrm{U}}^{3+}$ shows red colour.

Describe the colours of actinide cations.

Transuranic elements are elements with atomic no. greater than _____. Americium($\mathrm{Am}$) is an example of a transuranic element.

The magnetic properties of the actinoids are more complex than those of the _____.

Actinoids exhibit larger oxidation states than lanthanides because of the very small energy gap between _____ .

Explain the magnetic properties of actinoids ?

Explain the reasons for variable oxidation state shown by actinoids ?

Explain the variable oxidation states shown by actinoids ?

The actinoid used for the manufacture of fine rods for atomic reactors is _____.

Which of the following ion is colourless?

${\mathrm{U}}^{3+}$ ,${\mathrm{Cm}}^{4+}$ , ${\mathrm{Th}}^{4+}$

Does actinoids show actinoid contraction similar to lanthanoid contraction ?

Which of the following actinoids show oxidation states upto $+7$?

Give an explanation for the gradual decrease in size (actinoid contraction) from element to element is greater among the actinoid than that among the Lanthanoids (lanthanoid contraction).