Fri December 23, 2011 By:

Mam, what are s,p,d and f blocks? You have not discussed it in the chapter video but you have used them in answering other children's queries.

Expert Reply
Fri December 23, 2011
Elements whose last electron enters in s,p,d and f-subshell are placed separately in s,p,d and f-block in periodic table respectively.Each block has certain characteristics which are similar among its elements. 
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