ELECTRONIC STRUCTURE -Calculating the wavelength of a spectral line from an ene

Question

ELECTRONIC STRUCTURE -Calculating the wavelength of a spectral line from an ene This energy diagram shows the allowed energy levels of an electron in a certain atom any SI preflx in the ALEKS Data tab.) Note: the St pref Zepto means 10 You can find the meaning of energy (7)) Use this diagram to complete the table below. What is the energy of the electron in the ground state? 0-1 What is the energy of the electron in the first excited state? l J If the electron makes the transition shown by the red arrow, from A to C,will a photon be absarbed or emitted? absorbed emitted Calculate the wavelength of the photon that would be absorbed significant digits. 0 nm or emited. Round your answer to 3 Check

Explanation / Answer

From the given energy diagram,

Energy of the electron in ground state = 100 x 10^-21 zJ

Energy of the electron in A state = 250 x 10^-21 zJ

When transition from A to C, photons are : absorbed

Wavelength of absorbed photon = 6.626 x 10^-34 x 3 x 10^8/500 x 10^-21

                                                    = 3.976 x 10^-7 = 397.6 nm

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