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The atomic numbers of the f-block elements are:

$\begin{array}{1 1}(a)\;58\;to\;71&(b)\;90\;to\;103\\(c)\;Both\;(a)\;and\;(b)&(d)\;None\end{array}$

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58 to 71 and 90 to 103 (Lanthanides & actinides).
answered Jan 30, 2014 by sreemathi.v
edited Aug 6, 2014 by balaji.thirumalai

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