what are lanthanides and actinides
Asked by gouthamjayarajan | 22nd Oct, 2009, 08:28: PM
The two rows of elements at the bottom of the Modern Periodic Table are called the lanthanides or Lanthanoids and actinoids or actinides.
Lanthanides - Ce(Z = 58) to Lu(Z = 71)
Actinides - Th(Z = 90) to Lr (Z = 103)
They are f block elements that means that the last electron in each element is filled in the f- orbital.
They are characterised by the outer electronic configuration (n-2)f1-14 (n-1)d0–1ns2.
These two series of elements are also called the Inner-Transition Elements (f-Block Elements).
They are all metals.
Answered by | 23rd Oct, 2009, 04:10: PM
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Verify mobile number
Enter the OTP sent to your number