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(B) The successive ionization potentials are $5.98, 18.8, 28.4, 120.1, 154 \ eV$. There is a large jump in energy between the $3^{rd}$ ionization pote

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$Al$

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(B) The successive ionization potentials are $5.98, 18.8, 28.4, 120.1, 154 \ eV$. There is a large jump in energy between the $3^{rd}$ ionization potential $(28.4 \ eV)$ and the $4^{th}$ ionization potential $(120.1 \ eV)$. This indicates that the element has $3$ valence electrons in its outermost shell. Among the given options,both Boron $(B)$ and Aluminium $(Al)$ belong to Group $13$ and have $3$ valence electrons. However,the ionization energy values provided are characteristic of Aluminium,as Boron has significantly higher ionization potentials due to its smaller atomic size.

Starting from the $1^{st}$,the successive ionization potentials of an element are respectively $5.98, 18.8, 28.4, 120.1, 154 \ eV$. The element is

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