Question
What are lanthanoids $($or lanthanides$)$?
What is the lanthanoid series?
What is the lanthanoid series?
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Answer
Lanthanoids or Lanthanoid series or Lanthanones : The series of fourteen elements from $_{58}Ce$ to $_{71}Lu$ in which a differentiating electron enters $4f$ sub$-$shell and follows lanthanum is called lanthanoid series and the elements are called lanthanoids.
They have general electronic configuration,$ [Xe] 4f^{1-14} ,5d^{0-1}, 6s^2.$
They follow Lanthanum $(Z = 57)$ in $3d-$series.
They have general electronic configuration,$ [Xe] 4f^{1-14} ,5d^{0-1}, 6s^2.$
They follow Lanthanum $(Z = 57)$ in $3d-$series.
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