Dear Student
General Electronic Configuration of Lanthanides:[Xe]4f1-14 5d0-1 6s2
General Electronic Configuration of actinoids is [Rn] 5f1-14 6d0-1 7s2
Common oxidation state: +3 (for lanthanides), +3 and +4 for actinoids
Highest oxidation state shown by Lanthanide and Actinide together: +8 (shown by Americium, Plutonium)
Regards