Consider an atom with two closely spaced excited states A and B. If the atom jumps to ground state from A or from B, it emits a wavelength of 497 nm or 510 nm, respectively. What is the energy difference between states A and B? Number n Units VJ In the figure, the x rays shown are produced when 35.0 keV electrons strike a molybdenum target. If the accelerating potential is maintained at this value but a different target is used instead, what values of (a) Apin, (b) the wavelength of the K, line and (c) the wavelength of the Kj line result? The K, L, and M x-ray levels for the new target are 26.81, 3.74,and 0.83 keV. Continuous spectrum Ag )'min Relatve intensity S0 40 50 (1) 70 S0 ) Wavelength (pm) (a) Number n Units v (b) Number n Units v 7\\ An isolated atom of germanium has 32 electrons, arranged in subshells according to this scheme: 15% 25%2p 857 3p 3d 45~4p~. This element has the same crystal structure as silicon and, like silicon, is a semiconductor. Which of these electrons form the valence band of crystalline germanium? O 4p? () 4s2 4p? O 3410 () 452