Which of the following statements is incorrect? The atomic form factor is a measure of the .a O scattering power of each atom in the unit .cell The reciprocal Lattice of a SC Lattice is .b O .also a SC lattice The set of reciprocal lattice vectors has no .CO .relation to the possible x-ray reflections The set of reciprocal lattice vectors .d .determines the possible x-ray reflections

Question 14 a) A narrow beam of white light is passed through a clear glass vessel containing cool hydrogen gas at a low pressure. A prism is used to disperse the light leaving the vessel. This results in a white light spectrum, crossed by a series of dark lines. Explain the origin of these dark lines and name the type of spectrum that is produced. b) Some of the atomic energy levels of hydrogen are shown in the diagram below. i. ii. iii. Energy/eV 0 -0.85 -1.51 -3.39 -13.58 n = 4 n = 3 n = 2 n = 1 Determine the ionization energy of hydrogen and express this in joules. Determine the wavelength of the light emitted when an electron falls from the n = 3 level to the n = 1 energy level. A photon of energy 10.19 eV is in collision with a hydrogen atom. What would happen to this photon?

Relative to electrons and electron states, what does the I quantum number specify? Select one: a. The electron shell. b. The number of electron states in each electron subshell. c. The electron subshell. d. The number of electrons. e. The spin moment on each electron.