This energy diagram shows the allowed energy levels of an electron in a certain

Question

This energy diagram shows the allowed energy levels of an electron in a certain atom. (Note: the SI prefix zepto' means 10 . You can find the meaning of any SI prefix in the ALEKS Data tab) energy (z)) Use this diagram to complete the table below. What is the energy of the electron in the ground state? D What is the energy of the electron in the frst excited If the electron makes the transition shown by the red arrow, from C to A, wil a photon be absorbed or absorbed emtted Calculate the wavelength of the photon that would be absorbed or emitted. Round your answer to 3 signficant digits. 0 sm

Explanation / Answer

energy of electron in ground state is 150 zJ
energy of electron in first excited state is 600 zJ
The red arrow from C to A is returning back to ground state from the excited state, Hence, it is emission. Therefore, the photon is emitted.
From C to A, the realease of energy = 950 zJ - 150 zJ = 800 zJ that is 8 x 10-19J
we know, E = hc/lambda
or wavelength (lambda) = hc/E
= 6.626 x 10-34 Js x 3 x 108 ms-1/ 8 x 10-19 J = 19.8 x 10-34+8+19 = 19.8 x 10-7 m or 0.198 nm

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