Question

Write the general electronic configuration of lanthanoids. What are transuranic elements?

Answer 1

The general electronic configuration of lanthanoids is $\left[Xe\right]4f_{1-14}5d_{0-1}6s2$.

The elements which have an atomic number greater than $92$, called transuranic elements. All of these elements are unstable and decay radioactively into other elements such as neptunium, plutonium, americium, curium, berkelium, californium, einsteinium etc.