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A Be3+ ion emitts a photon with a wavelength of 6.42 × 100 nm. If the...

A Be3+ ion emitts a photon with a wavelength of 6.42 × 100 nm. If the energy of the initial state of the Be3+ ion was -3.88 × 10(-18) J, calculate the energy of the final state. Express answer in scientific notation.
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