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JEE Main 2022 Chemistry question

ChemistryStructure of AtomJEE Main 2022

The longest wavelength of light that can be used for the ionisation of lithium atom (Li) in its ground state is m. The value of x is . (Nearest Integer) (Given : Energy of the electron in the first shell of the hydrogen atom is −2.2 J; Js and )

Answer: 4

Solution

Treating the valence electron of Li as hydrogen-like (Z = 3, n = 2), the ionisation energy is J. Then

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Question ID VK-024976