JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Application +4 | -1

The ionization energy of

\mathrm{He}^{+}

\mathrm{x}

times that of

\mathrm{H}

. The ionization energy of

\mathrm{Li}^{2+}

\mathrm{y}

times that of

\mathrm{H}

. Find

|\mathrm{y-x}|

View answer and explanation

Correct option: A

Option A (5) is correct because the ionization energy is proportional to

Z^2

, and the difference between the ionization energies of

Li^{2+}

and

He^+

relative to H is 5.

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