One of the emission spectral lines for Be3+ has a wave-length of 253.4 nm for an electronic

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One of the emission spectral lines for Be3+ has a wave-length of 253.4 nm for an electronic transition that begins in the state with n = 5. What is the principal quantum number of the lower-energy state corresponding to this emission?
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Chemical Principles

ISBN: 978-1111580650

7th edition

Authors: Steven S. Zumdahl, Donald J. DeCoste

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