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What wavelength of light in nanometers must be absorbed to promote the electron in Li2 plus from n 1 to n 4?
Wiki User
∙ 11y ago
Get Hertz with this formula. Z = 3 for Li.
Hertz = (3.29 X 1015 s -1)*Z2*(1/Nf2 - 1/Ni2)
We will reverse initial and final to avoid negatives.
Hertz = (3.29 X 1015 s -1)(32)(1/12 - 1/42)
Hertz = (9.87 X 1015)(15/16)
= 9.25 X 1015 Hertz
------------------------------Now, this formula.
Wavelength = speed of light/Hertz
Wavelength = 2.998 X 108 m/s/9.25 X 1015 Hertz
= 3.24 X 10 -8 meters (109/1 meter)
= 32.4 nanometers
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Wiki User
∙ 11y ago
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