When an electron jumps from the second orbit to fourth orbit, its distance from nucleus increase...

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When an electron jumps from the second orbit to fourth orbit, its distance from nucleus increases by \( 2.116 \AA \). The atom or ion should be
(a) \( \mathrm{H} \) atom
(b) \( \mathrm{He}^{+} \)ion
(c) \( \mathrm{Li}^{2+} \) ion
(d) \( \mathrm{Be}^{3+} \) ion
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