Electronic Configuration of Lanthanoids

What is the method for finding out the outer electronic configuration of actinoids and lanthanoids?
A question came in AIEEE 2011 asking the same for Gd. How do we find it?

1 Answers

21
Arnab Kundu ·

they are f block elements................it lies in lanthinides where the nearest noble gas is Xe......
due it is a n f block element it will have ns2 where n stands for the no. of shells it has.....
rest we have got to remember.........
Gd=[Xe]4f7 5d1 6s2

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