Question
Asked Oct 16, 2019

The energy for one state of the Li2+ ion is -2.18*10^-18 J. What frequency (Hz) of light would need to be absorbed to reach a state with an energy of -1.23*10^-18 J?

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Step 1

The difference in the two energies is computed as,

AE E2- E
AE - 1.23 x 10-18- -2.18 x 10-18)
AE 0.95 x 10-18 J
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AE E2- E AE - 1.23 x 10-18- -2.18 x 10-18) AE 0.95 x 10-18 J

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Step 2

The frequency can be ...

AE h v
0.95 x 10-18 J= 6.626 x 10-34 J-s x v
v = 1.43 x 1015 sec-
v = 1.43 x 1015 Hz
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AE h v 0.95 x 10-18 J= 6.626 x 10-34 J-s x v v = 1.43 x 1015 sec- v = 1.43 x 1015 Hz

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