The outer electronic configuration of an element is, \[ (n-2) f^{7}(n-1) d^{1} n s^{2} \text {. ...

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The outer electronic configuration of an element is,
\[
(n-2) f^{7}(n-1) d^{1} n s^{2} \text {. }
\]
To which block in the long form of the periodic table does this belong?
(A) \( s \)-block
(B) \( p \)-block
(C) \( d \)-block
(D) \( f \)-block
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