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Question

Which of the following energy levels is not possible in the Bohr hydrogen atom? a. = -2.179 x J 10^-18 b. = -5.445 x J 10^-19 c. = -2.421 x J 10^-19 d. = -2.183 x J 10^-19 e. = -1.362 x J d is the correct answer, not sure what formula to use to get that answer