All members of the D block and f block elements are collectively known as a transition elements because their properties intermediate between these elements sometimes, such as known as non-known elements, as chemical behaviors depend on another cell electrons.
Classification
Outer elements or D Block Elements are all the members of the transition
elements because their outermost electron enters and Outer D orbital while there in a f subshell or still remain lekcent
Outer Transition Element
Contains 4 series 10 element is this block contains 40 elements the outer transition elements series is third form fourth period contains 1 series of 10 elements and ends at 7th period
Inner Transition Element or f-block elements
this type of elements are present in to first b2x subgroup dost transition elements in which are present in 3rd 20 sub groups and their outermost electron enters in inner subshells for f and v f subshell they are mostly radioactive this block content to series 14 elements and one series this contains a 28 elements of Two Cities of lanthanides and actinides
actinides elements 14 elements which causes properties similar to actinides length and nights are elements 14 elements which possess properties similar of lanthanides law
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