JEE Main 2022 — Structure Of Atom Question with Solution
From: JEE Main 2022 (Online) 25th June Morning Shift
Question
The longest wavelength of light that can be used for the ionisation of lithium atom (Li) in its ground state is x 108 m. The value of x is ___________. (Nearest Integer).
(Given : Energy of the electron in the first shell of the hydrogen atom is 2.2 1018 J ; h = 6.63 1034 Js and c = 3 108 ms1)
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Step-by-step explanation
Bohr model is not valid for lithium atom (Li) as Bohr model is valid for only single electronic species, so it would be valid for Li+2 but not Li atom.
So this question is BONUS.
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This is a previous-year question from JEE Main 2022, covering the Structure Of Atom chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.