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The energy associated with the first orbit in the hydrogen atom is - 2.18 × 10^{-18} J atom^{-1}. What is the energy associated with the fifth orbit?

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#### Solution

Energy associated with the fifth orbit of hydrogen atom is calculated as:

`"E"_5 = (-(2.18xx10^(-18)))/(5)^2 = (-2.18xx 10^(-18))/25`

E_{5} = - 8.72 × 10^{-20} J

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