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What are the s, p, d, f blocks on the periodic table?
S block :- Consists of Group 1 and group 2 in addition to helium.
P block :- Consists of group 13 to 18 except helium.
D block:- Consists of all the transition metals
F block:- Consists of all the lanthanides and actinides.
Each block represents the outermost suborbital being filled.