In first 110 elements how many elements having ${e^ - }$ in $5f$ subshell:-

JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Application +4 | -1

In first 110 elements how many elements having

{e^ - }

5f

subshell:-

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Correct option: C

Option C (20) is correct because elements from atomic number 91 to 110 have electrons in the 5f subshell, totaling 20 elements.

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X

\mathrm{O}, \mathrm{O}^{2-}, \mathrm{F}

\mathrm{F}^{-}