The Actinoids

Ionisation enthalpies of actinoids are lower than lanthanoids.

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

Which of the following are correct difference between the Lanthanoids and Actinoids:

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?

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

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

Explain why ${\mathrm{Gd}}^{+3}$ is colourless.

Differentiate between lantanoids and actinoids.

What are trans-uranic elements? Write their names.

What are actinoids?

Explain the position of actinoid.

The extent of actinoid contraction is greater than lanthanoid contraction, explain.

Give four differences of Lanthanoid and Actinoid series.

Define transuranic elements.

Lanthanoids exhibits smaller number of oxidation states than actinoids because: