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JEE Main202225 Jun 2022Morning ShiftChemistryStructure of AtomActual

The longest wavelength of light that can be used for the ionisation of lithium ion (Li²⁺) is x × 10 - 8 m . The value of x is (Nearest Integer) (Given : Energy of the electron in the first shell of the hydrogen atom is - 2 . 2 × 10 - 18 J ; h = 6 . 63 × 10 - 34 Js and c = 3 × 10 8 ms - 1 )

Correct answer

0

Step-by-step solution

Electronic configuration of Li = 1 s 2 2 s 1 E Li n = 2 = E H Z 2 n 2 = - 2 . 2 × 10 - 18 × 9 4 6 . 63 × 10 - 34 × 3 × 10 8 λ = 2 . 2 × 10 - 18 × 9 4 λ = 4 × 10 - 8   m

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