An X-ray photon with a wavelength of 0.965 nm strikes a surface. The emitted electron has a kinetic energy of 956 eV. Part A What is the binding energy of the electron in kJ/mol?
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- A hydrogen atom emits a photon of wavelength 97.41 nm. Based on the Bohr model of the hydrogen atom, what energy level transition does this correspond to? In other words, identify the initial and final values of n. Enter integers for your answers. n₂ = nf =5aIn Millikan's oil-drop experiment, one looks at a small oil drop held motionless between two plates. Take the voltage between the plates to be 2051 V and the plate separation to be 2 cm. The oil drop (of density 0.81 g/cm3) has a diameter of 4.0 ×10-6 m. Find the charge on the drop, in terms of electron units. e
- Which of the effects listed below are considered to be the main limiting factors for increasing thecurrent density of the photoelectrodes? (More than one answer possible.) a. Bandgap of the semiconductor forming the photoelectrode b. Reflection in the electrolyte between the light source and the photoelectrode c. Separation of charges in the photoelectrode semiconductor material d. Catalytic effects in the photoelectrode surface e. Mass transport of ions within the electrolyteOnly need part aA. Calculate the de Broglie wavelength for an electron that has kinetic energy 48.4eV B. Calculate the de Broglie wavelength for an electron that has kinetic energy 48.4keV.
- A photoelectric-effect experiment finds a stopping potential of 1.93 V when light of 200 nm wavelength is used to illuminate the cathode.a. From what metal is the cathode made?b. What is the stopping potential if the intensity of the light is doubled?Part A What is the energy range (in joules) of photons of wavelength 420 nm to 750 nm ? Express your answers using two significant figures separated by a comma. ? Emin Emax = J Submit Request Answer Part B What is the energy range (in eV) of photons of wavelength 420 nm to 750 nm ? Express your answers using two significant figures separated by a comma. Emin. Emax = eV Submit Request AnswerPlease answer parts b, c, and d
- Question A3 Cesium hydride, CsH, has the cesium chloride structure with unit cell parameter a = 3.82 Å. a) Calculate the Coulomb (ionic) energy of CsH, assuming that the ions have their formal charges Cs and H. Give your answer in kJ mol-1. b) A neutron diffraction pattern was measured from a powder sample of this material. The neutron scattering length of Cs is 5.42 fm and of H is -3.74 fm. Calculate the structure factor and multiplicity of (i) the (200) diffraction peak; and (ii) the (210) diffraction peak. Hence (iii) estimate the ratio of the intensity of the (200) to the (210) peak in the diffraction pattern.The following table lists the work functions of a few common metals, measured in electron volts. Metal (eV) Cesium 1.9 Potassium 2.2 Sodium 2.3 Lithium 2.5 Calcium 3.2 Copper 4.5 Silver 4.7 Platinum 5.6 Part A Light with a wavelength of 190 nm is incident on a metal surface. The most energetic electrons emitted from the surface are measured to have 4.0 eV of kinetic energy. Which of the metals in the table is the surface most likely to be made of? ▸ View Available Hint(s) O cesium potassium sodium lithium Using these data, answer the following questions about the photoelectric effect. 000 calcium copper silver O platinum Submit Part B Of the eight metals listed in the table, how many will eject electrons when a green laser (g = 510 nm) is shined on them? ▸ View Available Hint(s) ○ 0 1 ○ 2 3 4 5 6 ○ 7 ○ 8 Submit Part C Light with some unknown wavelength is incident on a piece of copper. The most energetic electrons emitted from the copper have 2.7 eV of kinetic energy. the copper is…Do it asap only part a