Question

D and f block advantage and disadvantage

Answer 1

D-Block element :: In the atoms of these elements, last electron enters d-orbital of penultimate shell, I.e.,( n -1) d-orbital. They have electronic configuration ( n-1) d^1 ns^1-2 to (n-1 ) d^10 ns^1-2,and they belong to group 3 to 12 and they are placed in the middle portion of the periodic table. There are four d series elements namely 3d,4d,5d,& 6d series..

F-Block element ::In the atoms of these elements, last electron enters into f-orbital of pre-penultimate shell, I.e., ( n-2) f-orbital. They have electronic configuration ( n-2)f^1 (n - 1)d^0,1 ns^2 to (n-2)f^14 (n-1)d^0,1 ns^2 & placed at the bottom of the periodic table. This block consists of series of Lanthanides and Actinides.

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