Question

general electronic configuration of actinoids

Answer 1

General characteristics of Actinides: Electronic Configuration: It is not sure whether the last electron enters the 5f orbital or the 6d orbital as both have the same energy. ... The general electronic configuration of actinium is [Rn] 5f0-14 6d0-2 7s2 where Rn is the electronic configuration of the element Radium.

Answer 2

The elements in which the 5f orbital is filled as the electrons are added are termed as the actinides. As in lanthanides, the anti-penultimate 5f orbital is filled successively by the addition of one electron at each step. Thus, lanthanides are termed the first inner transition series while actinides constitute the second inner transition series.


Actinide series are named after actinium, the very first element of the series. In this series, the first four elements actinium, thorium, protactinium and uranium occur in nature. The other elements are artificial and are made by the nuclear bombardment.