The X-ray spectrum for a typical metal is shown in Figure 31-22. Find the approximate wavelength of Kβ X-rays emitted by chromium. (Hint: An electron in the M shell is shielded from the nucleus by the single electron in the K shell, plus all the electrons in the L shell.)

-1.94e-16Your answer is incorrect. nm (Also tried 1.94e-16)

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Z=atomic number of chromium (24)

for E n1=1

for E n1=3

Used E= -13.6eV(Z-1)2/n12

Found Ek , E Used these two values to find ΔE.  Converted ΔE to J. Then plugged everything in to this formula λ=hc/ΔE

Came up with -1.94e-16 and that was wrong. 

Where did I go wrong?


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