Whichof the followingsequencescontainatomicnumbersof onlyrepresentativ

1.	Whichof the followingsequencescontainatomicnumbersof onlyrepresentativeelements
Answer» `3, 33, 53, 87 ` `2, 10, 22, 36 ` `7, 17 , 25 , 37 , 48 ` `9, 35 , 51, 88` Solution :Elementsof s- andp-blockelementsare calledrepresentative elements , elements of d-block(Z=21-30 , 39 -48 , 57 and72 -80 and89and 104 -112 ) are called transitionelementswhile those of f-block( with Z=58-71and Z= 90 -103) arecalledinnertransitionelement . Inthe lightofthis divisionelementslisted under option ( a) andoption( d) are allrepresentative elements.

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