What is the energy of the photon that, when absorbed by a hydrogen atom, could cause an electronic transition from the n = 3 state to the n = 5 state? Answer in units of eV. What energy could cause an electronic transition from the n = 5 state to the n = 7 state? Answer in units of eV.

While most transition metals have work functions corresponding to photon frequencies that are larger (higher) than visible light, alkali and alkaline earth metals have low-energy work functions. For example, calcium has a work function of Po = 4.3419x10-19 J. (a) What is the initial state n; for the hydrogen emission lines at visible wavelengths (i.e., those with nf = 2) for the lowest-energy photon that would eject an electron from calcium? (b) If the colors of the visible hydrogen emission lines (n; = 3 to n; = 6) are red, green, blue and violet, which colors are capable of ejecting the electrons from calcium? (c) The energy of the emitted photon you identified in part (a), is not identical to the workfunction of calcium. Therefore, the electron is ejected from the metal surface with some kinetic energy (i.e., energy is conserved in the photoelectric effect process). What would the velocity of the electron ejected from calcium (in meters per second)?

Chapter 39, Problem 044 A hydrogen atom in a state having a binding energy (the energy required to remove an electron) of -1.51 eV makes a transition to a state with an excitation energy (the difference between the energy of the state and that of the ground state) of 10.200 eV. (a) What is the energy of the photon emitted as a result of the transition? What are the (b) higher quantum number and (c) lower quantum number of the transition producing this emission? Use -13.60 eV as the binding energy of an electron in the ground state. (a) Number Units (b) Number Units (c) Number Units

The electron in a hydrogen atom undergoes a transition from the n=3 energy state to the ground state, n= 1. How much energy, in eV, will be given off by the electron? Use three significant figures. Note that, for hydrogen, at n=1. En=1=-13.6 eV