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.) 1400 1200 alo 1000 800 energy (z)) 600 400 Use this diagram to complete the table below What is the energy of the electron in the ground state? ×10 What is the energy of the electron in the first excited state? If the electron makes the transition shown by the red arrow, from C to B, will a photon be absorbed or o absorbed o emitted mitted Calculate the wavelength of the photon that would be absorbed or emitted. Round your answer to 3 significant digits.

Explanation / Answer

1)
ground state is A
Its energy is 150 zJ
Answer: 150 zJ

2)
1st excited state is B
Its energy is 250 zJ
Answer: 250 zJ

3)
electron moves from C to B
here energy is released
Answer: emitted

4)
Energy of wavelength = C - B
= 450 zJ - 250 zJ
= 200 zJ
= 200*10^-21 J
= 2.00*10^-19 J

use:
E = h*c/lambda
2*10^-19J =(6.626*10^-34 J.s)*(3.0*10^8 m/s)/lambda
lambda = 9.94*10^-7 m
lambda = 9.94 nm

Answer: 9.94 nm

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