Question

what are Lanthanide? name all the Lanthanide element. discuss their electronic configuration, magnetic properties and Oxidation State​

Answer 1

Elements from57-71 are called lanthanides.

Answer 2

Answer

Elements from 58 to 71 are called as Lanthanides,ie., from Ce(58) to Lu(71).

These elements are placed separately because they belong to f block elements. That means they end with the configuration of  f subshell.

As per the Mendeleeff's periodic table it's oxidation state is RO^2.

For eg: CeO2

And it's reduction state is RH^4.

For eg: CeH4.

Hope u got ur answer.