The ground state energy in J, of hydrogen atom is –X. The minimum energy in J, required to promote an electron from n = 1 to n = 2 in He+ is

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4X/3

3X/4

X/3

answer is A.

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Detailed Solution

; given E1 = X......(1)for He+ ion Z = 2∆E ; energy absorbed for the electronic transition 1 → 2

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