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1. A hydrogen atom with its electron in the n = 5 energy level emits a photon of IR light. (i)[3 marks] Calculate the change

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Answer #1

The electron in n = 5 energy level emits a photon of IR light means the electron has deexcited to n = 3 or n = 4.

(solved question by considering n = 5 to n = 3)

(i) Energy change

  E = h\nu = hc/\lambda = hc\bar{\nu }3 R=109677 care ne-3, 2-5 1 R 1096 77 cm 3 = 109677 cost [ã ) = 109677 cost [ 16/225] = 7799.253 cm hc -34 b= 6.625xJO J. Se

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