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- A beryllium ion with a single electron (denoted Be3+) is in an excited state with radius the same as that of the ground state of hydrogen. (a) What is n for the Be3+ ion? (b) How much energy in eV is needed to ionize the ion from this excited state?(a) What is the minimum value of 1 for a subshell that has 11 electrons in it? (b) If this subshell is in the n=5 shell, what is the spectroscopic notation for this atom?Which of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n = 3 to n = 2 in a Bohr hydrogen atom? Given h = 4.14 x 10-15 eVs and c = 3.00 x 108 m/s. a. 1.89/hxc b. hc/1.89 c. 1.89 x h x c d. (1.51 + 3.4)/hc e. hc/3.4
- Tutorial Week 15 1. Find the amount of energy needed in the transition of hydrogen electrons into higher orbits (total of three), absorbing photons which have wavelengths of (1) 1005 nm (2) 1282 nm and (3) 1875 nm. 2. Determine the longest and shortest wavelengths of the Lyman series. 3. Suppose the initial amount of Cesium-137 is 1.5 kg, find the amount of Cesium-137 remain after 1000 years.Which of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n = 3 to n = 2 in a Bohr hydrogen atom? Given h = 4.14 x 10-15 eVs and c = 3.00 x 108m/s. a. 1.89 x h x c b. hc/3.4 c. (1.51 + 3.4)/hc d. hc/1.89 e. 1.89/hxcWhich of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n=3 n=2 in a Bohr hydrogen atom? Given h=4.14 x 10^15 eVs and c=3.00 x 10^8 m/s. A. 1.89 x h x c B. hc/1.89 C. 1.89/hxc D. (1.51+ 3.4)/hc E. hc/3.4
- 3.a. By using the de Broglie relation, derive the Bohr condition mvr = nh. 3.b.Use this expression to show that the allowed electron energy states in Hydrogen atom can be written mk? e En 2k² r? 3.c.Find the wavelength of photon that is emitted when the electron in a Hydrogen atom undergoes a transition from n=3 to n=1.Consider an electron in a hydrogen atom that undergoes a transition from n = 3 to n = 7. a. Is the atom undergoing absorption or emission? b. What is the change in energy of the atom? c. What is the wavelength (in nm) of the photon absorbed or emitted? d. What is the frequency of the photon absorbed or emitted?a) An electron in a hydrogen atom has energy E= -3.40 eV, where the zero of energy is at the ionization threshold. In the Bohr model, what is the angular momentum of the electron? Express your result as a multiple of ħ. Ans. b) What is the deBroglie wavelength of the electron when it is in this state? Ans. c) When the electron is in this state, what is the ratio of the circumference of the orbit of the electron to the deBroglie wavelength of the electron? Ans. d) The electron makes a transition from the state with energy E= -3.40 eV to the ground state, that has energy -13.6 eV. What is the wavelength of the photon emitted during this transition? Ans.
- According to the Bohr model of the atom electrons exist in orbits around the atomic nucleus labelled by a quantum number n. The Bohr radius of an Hydrogen atom is 0.53 angstroms. What is the radius for the n = 3 orbit ? Select one: a. 1.59 angstroms. b. 4.77 angstroms. c. 3.18 angstroms. d. 0.176 angstroms. Clear my choiceQUESTION 10 Which of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n = 3 to n = 2 in a Bohr hydrogen atom? Given h = 4.14 x 10-15 eVs and c = 3.00 x 108 m/s. a. hc/1.89 b. 1.89 x h x c c. 1.89/hxc d. (1.51 + 3.4)/hc e. hc/3.44. a. An electron in a hydrogen atom falls from an initial energy level of n-5 to a final level of n - 2. Find the energy, frequency, and wavelength of the photon that will be [For hydrogen: E-13.6 eV/n²] emitted for this sequence. b. A photon of energy 2.794 eV is absorbed by a hydrogen atom, causing its electron to be released with a kinetic energy of 2.250 eV. In what energy level was the electron? c. Find the wavelength of the matter wave associated with a proton moving at a speed of 350 m/s.
