JEE Main 2010 — Structure Of Atom Question with Solution
From: AIEEE 2010
Question
Ionisation energy of He+ is 19.6 x 10–18 J atom–1. The energy of the first stationary state (n = 1) of Li2+ is
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Show full solutionCorrect option: B
Correct answer
B-4.41 x 10–17 J atom–1
Step-by-step explanation
Ionisation energy(IE) - It is the energy required to move an electron from ground state to infinity.
IE = = =
E1 of He+ = - 19.6 x 10–18 J atom–1
Energy of a species at n state,
(En)species = (En)hydrogen Z2
(E1)hydrogen = [ For He, Z = 2 ]
(E1)Li+2 =
= -4.41 x 10–17 J atom–1
IE = = =
E1 of He+ = - 19.6 x 10–18 J atom–1
Energy of a species at n state,
(En)species = (En)hydrogen Z2
(E1)hydrogen = [ For He, Z = 2 ]
(E1)Li+2 =
= -4.41 x 10–17 J atom–1
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