1. [-/1 Points] DETAILS OSCOLPHYS2016 30.1.P.001. MY NOTES ASK YOUR TEACHER Using the given charge-to-mass ratios for electrons and protons, and knowing the magnitudes of their charges are equal, what is the ratio of the proton's mass to the electron's? (The charge-to-mass ratios for electrons and protons are -1.7588 x 104 C/kg and 9.5788 x 10' C/kg, respectively. Note that since the charge-to-mass ratios are given to five-digit accuracy, your answer may differ from the accepted ratio. Round your answer to at least five significant figures.) mp me + Additional Materials Reading 2. [-/1 Points] DETAILS OSCOLPHYS2016 30.1.P.003. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER If someone wanted to build a scale model of the atom with a nucleus 1.23 m in diameter, how far away in kilometers would the nearest electron need to be? (Take the diameter of the atom to be 10 10 m and the diameter of the nucleus to be 10-15 m.) km3. [-/1 Points] DETAILS OSCOLPHYS2016 30.2.P.004. MY NOTES ASK YOUR TEACHER Rutherford found the size of the nucleus to be about 10-15 m. This implied a huge density. What would this density be in kg/m for gold? (Assume that the "size" of the nucleus is its diameter.) kg/m3 Additional Materials Reading 4. [-/1 Points] DETAILS OSCOLPHYS2016 30.2.P.005. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER In 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 2048 V, and the plate separation to be 2.22 cm. The oil drop (of density 0.81 9/cm) has a diameter of 4.00 x 1076 m. Find the charge on the drop, in terms of electron units. Additional Materials Reading 5. [-/1 Points] DETAILS OSCOLPHYS2016 30.3.P.007. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER By calculating its wavelength (in nm), show that the first line in the Lyman series is UV radiation. nm.7 77777 7 r. 7 7.777 77 77 777 .77777 .- 777..77777 . . 777 77777. 7777-77777 H 7777 7 7 777 7777 7 77 7-7 .,.7 7..7777 6. [I1Points] I DETAILS I OSCOLPHYSZO1630.3.P.O17. MY NOTES ll ASKYOURTEACHER Do the Balmer and Lyman series overlap? To answer this, calculate the shortest-wavelength (in nm) Balmer line and the longest-wavelength (in nm) Lyman line. AB, min = nm AL, max = "m Do the Balmer and Lyman series overlap? ' Yes ' No Additional Materlals E] Reading 7. [/1 Points] OSCOLPHYSZO16 30.4.P.025. ASK YOUR TEACHER PRACTICE ANOTHER (a) What is the shortest-wavelength x-ray radiation in m that can be generated in an x-ray tube with an applied voltage of 63.1 W? m (b) Calculate the photon energy in eV eV (c) Explain the relationship of the photon energy to the applied voltage. The maximum photon energy is just the applied voltage times the electron charge. The value of the voltage in volts equals the value of the maximum photon energy in electron volts The maximum photon energy is just the applied voltage divided by the electron charge. The value of the voltage in volts equals the value of the maximum photon energy in electron volts. The maximum photon energy is just the applied voltage divided by the electron charge. The value of the voltage in volts equals the inverse of the value of the maximum photon energy in electron volts. ' ' The maximum photon energy is just the applied voltage times the electron charge. The value of the voltage in volts equals the inverse ofthe value of the maximum photon energy in electron volts. 10. [-/1 Points] DETAILS OSCOLPHYS2016 30.5.P.032. MY NOTES ASK YOUR TEACHER Ruby lasers have chromium atoms doped in an aluminum oxide crystal. The energy level diagram for chromium in a ruby is shown in the figure below. Third 3.0 eV Second 2.3 ev First Metastable 1.79 eV Ground state 0.0 ev Ruby (Cr3+ in Al203 crystal) What wavelength (in nanometers) is emitted by a ruby laser? nm11. [-/1 Points] DETAILS OSCOLPHYS2016 30.5.P.033. MY NOTES ASK YOUR TEACHER Ruby lasers have chromium atoms doped in an aluminum oxide crystal. The energy level diagram for chromium in a ruby is show in the figure below. Third 3.0 ev Second 2.3 eV First Metastable 1.79 ev Ground state 0.0 ev Ruby (Cr3+ in AlzO3 crystal) (a) What energy photons (in ev) can pump chromium atoms in a ruby laser from the ground state to its second and third excited states? Ephoton, 2 = ev Ephoton, 3= ev (b) What are the wavelengths (in nm) of these photons? Note that they are in the visible part of the spectrum. 12 = nm 13 = nm +V 77777 7 r. 7 7.777 77 77 777 .77777 \"777-77777 .. 777 77777. 7777-7777777 \"77777 7 777 777 7 77 7-7 .,.7 7..7777 12. [-11 Points] DETAILS OSCOLPHYSZO16 30.8.P.035. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER If an atom has an electron in the n = 6 state with m, = 4, what are the possible values of I? (Enter your answers as a comma-separated list.) Additional Materials E] Reading 13. [-/1 Points] DETAILS OSCOLPHYSZO16 30.8.P.036. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER An atom has an electron with m, = 5. What is the smallest value of n for this electron? Addltlonal Materials III Reading 14. [-/1 Points] DETAILS OSCOLPHYS2016 30.8.P.040. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) What is the magnitude of the angular momentum (in J . s) for an { = 4 electron? J . S (b) Calculate the magnitude of the electron's spin angular momentum (in J . s). J . S (c) What is the ratio of the first angular momentum to the second angular momentum? L S +15. [-/1 Points] DETAILS OSCOLPHYS2016 30.9.P.044. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) How many electrons can be in the n = 3 shell? (b) What are its subshells? (Select all that apply.) S OP Od g For n = 3, how many electrons can be in each subshell? s subshell p subshell d subshell f subshell g subshell +16. [-/1 Points] DETAILS OSCOLPHYSZO16 30.9.P.045. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) What is the minimum value of! for a subshell that has 22 electrons in it? (b) If this subshell is in the n = 6 shell and assuming the minimum value of! above, what is the spectroscopic notation for this atom? (Answer using the format 2p3.) 8. [-/1 Points] DETAILS OSCOLPHYS2016 30.4.P.026. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A color television tube also generates some x rays when its electron beam strikes the screen. What is the shortest wavelength in m of these x rays, if a 23.5-kV potential is used to accelerate the electrons? (Note that TVs have shielding to prevent these x rays from exposing viewers.) m Additional Materials Reading 9. [-/1 Points] DETAILS OSCOLPHYS2016 30.5.P.031. MY NOTES ASK YOUR TEACHER A helium-neon laser is pumped by electric discharge. What wavelength electromagnetic radiation in nm would be needed to pump it? See the figure below for energy-level information. (Enter your answer to at least one decimal place.) Collision transfers energy First 1.96 ev Metastable 20.61 ev 20.66 ev Ground state Helium Neon nm