X-ray Absorption Spectroscopy Electrons in multielectron
atoms absorb X-rays at characteristic energies, leading to
ionization. The characteristic energies for each element allow
scientists to identify the element. For magnesium, X-rays
with λ = 952 pm are required to selectively eject an electron
from the n = 1 energy level, and X-rays with λ = 197 nm
remove an electron from the n = 2 energy level.
a. Calculate the frequency and energy of those X-rays.
b. Why are the wavelengths and energies different for the
two electrons?