In the Balmer series, the wavelength of a certain line is measured as 379.1 nm. What transition does this value correspond to?
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In the Balmer series, the wavelength of a certain line is measured as 379.1 nm. What transition does this value correspond to?
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- The wavelength of the emission line from n = 3 to n = 2 in the hydrogen atom is 656.1 nm. What is the wavelength associated with the same transition in the He* ion (in nm)?Infrared light with a wavelength of 1870 nm is emitted from hydrogen. What are the quantum numbers of the two states involved in the transition that emits this light?What is the frequency of light emitted from a hydrogen atom that makes a transition from the the n = 7 state to the n= 2 state (in Hz)?
- If you are shining light on a Pt electrode and no electrons are emitted, what do you have to do to generate electrons? Decrease the wavelength of the light to increase the energy of the photons to emit electrons Electrons can not be emitted from Pt because like any other noble metal it does not react, even under light exposure (unlike other metals, e.g. Na, Sr or Cu) Increase the wavelength of the light to increase the energy of the photons to emit electrons Wait longer times or increase the intensity of the light source, since the energy of the absorbed light is not high enough to emit electrons from Pt surfaceWhat wavelength of light is emitted by a hydrogen atom in which an electron makes a transition from the n = 5 to the n = 2 state? Enter this wavelength expressed in nanometers to one decimal place. 1 nm = 1 x 10-9 m Assume the Bohr model.How many photons are emitted per second from a semiconductor laser which emits 0.75 mW of light at a wavelength of 540 nm? O 239E+15 O 2.04E+15 O 2.85E+15 O 3.21E+15
- 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.The Balmer series in hydrogen includes the Paschen series. has four lines in the ultraviolet. O includes both the Paschen series and the Lyman series. O has four lines in the visible. O includes the Lyman series.Use the diagram (below) of the electric field and potential map produced by a positive and negative charge to answer questions 7 – 9. 7. What is the difference in electric potential between point A and point D? Briefly explain. because a ir higner in 8. Qualitatively describe the "change in elevation" of a proton if it could "walk" along the field line from C to D. (Is it moving “uphill", "downhill", or "staying at the same elevation"?) 9. Suppose the potential difference between points A and B is 8 V. What would be the change in electric potential energy (in J and in eV) of an electron as it moved from C to B? Be sure to indicate the sign of the change as well as the magnitude. 9e = -1.6x10-19C ©Tempe Preparatory Academy 2018 2
- Consider the atom having the electron configuration 1s2 2s2 2p6 3s2 3p1. Which of the following statements are correct? Tick all that apply, say the correct options. The atom has no electrons in tje energy level n=3 ?the atom has only electron in the state n=3 I=2 ?the atom has six electrons in the state n=2 I=1 ?The atom has three electrons in the energy level for which n=3 ?The atom has electrons in states n=2 and n=3 ?What wavelength of light is emitted by a hydrogen atom in which an electron makes a transition from the n = 8 to the n = 5 state? Enter this wavelength expressed in nanometers. 1 nm = 1 x 10-9 m Assume the Bohr model.