What are lanthanoids (or lanthanides)? OR What is the lanthanoid series?
Answer»
Lanthanoids or Lanthanoid series or Lanthanones : The series of fourteen elements from 58Ce to 71Lu in which a differentiating electron enters 4f subshell and follows lanthanum is called lanthanoid series and the elements are called lanthanoids.
They have general electronic configuration, [Xe] 4f1-14 ,5d0-1, 6s2.