Energy of electron in n-th orbit of hydrogen:
AE_n = +13.6 n²
BE_n = -13.6/n² eV
CE_n = h × n
DE_n = -n²
Answer & Solution
Correct answer: B. E_n = -13.6/n² eV
E_n = -13.6/n² eV (for hydrogen). Negative because electron is bound. Goes to 0 as n → infinity (free electron at infinity).
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