Answer
$1.4\times10^{7}s^{-1}$
Work Step by Step
λ = 21 m
c = $2.997925\times10^{8} ms^{-1}$
ν = c/λ = $\frac{2.997925\times10^{8} ms^{-1}}{21 m}$ =$1.4\times10^{7} s^{-1}$
Chemistry: Principles and Practice (3rd Edition)
by Reger, Daniel L.; Goode, Scott R.; Ball, David W.
Published by
Cengage Learning
ISBN 10:
0534420125
ISBN 13:
978-0-53442-012-3
Chapter 7 - Electronic Structure - Questions and Exercises - Exercises - Page 285: 7.27
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