Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.

(N/A) The last element in the actinoid series is lawrencium,$Lr$. Its atomic number is $103$ and its electronic configuration is $[Rn] \, 5f^{14} \, 6d^{1} \, 7s^{2}$. The most common oxidation state displayed by it is $+3$; because after losing $3$ electrons it attains stable $f^{14}$ configuration.