What is the energy associated with first orbit of Li^ 2+ (R_H = 2.18 x 10^ -18 J)?

MHT CET 2022 Chemistry question

What is the energy associated with first orbit of Li ( = 2.18 x 10J)?

Answer: (D)

Energy of the electron in the th orbit of a hydrogen-like species: . For Li, and : $ = -2.18× × =

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Question ID VK-093686