f-Block Elements

Out of the following identify the f-block element.

$\mathrm{f}$-Block are also called _____ elements.

Complete the reactions:

${\mathrm{Na}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7+\mathrm{KCl}⟶$

What is the difference between the electronic configurations of transition and inner-transition elements?

What are inner-transition elements? Give three properties in which actinoids resemble lanthanoid and the three properties in which the two differ from each other.

Define lanthanoids. Give three differences between lanthanoids and actinoids.

What are inner-transition elements? Write their general electronic configuration.

What are inner-transition elements? Decide which of the following atomic numbers are the atomic numbers of the inner-transition elements: $29, 59, 74, 95, 102, 104$

Write the electronic configurations of the elements with the atomic numbers $61,91,101$ and $109$.

Why the elements with atomic number $57$ to $71$ are called inner transition elements?

What are inner-transition elements? Decide which of the following atomic numbers are the atomic numbers of the inner transition elements : $29,59.74,95,102,104.$

What is the difference between the electronic configuration of lanthanoids and actinoids ?

State the common characteristic of lanthanoids and actanoids which places them in the $\mathrm{f}$-block of elements.

 Why lanthanoids and actinoids are called $\mathrm{f}$-block elements?