![College Physics](https://www.bartleby.com/isbn_cover_images/9781938168000/9781938168000_largeCoverImage.gif)
Concept explainers
Hydrogen gas can only absorb EM
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Chapter 30 Solutions
College Physics
Additional Science Textbook Solutions
University Physics with Modern Physics (14th Edition)
Sears And Zemansky's University Physics With Modern Physics
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
University Physics Volume 2
College Physics: A Strategic Approach (4th Edition)
Physics: Principles with Applications
- (a) Calculate the velocity of an electron that has a wavelength of 1.00 m. (b) Through what voltage must the electron be accelerated to have this velocity?arrow_forwardThe Lyman series of photons each have an energy capable of exciting the electron of a hydrogen atom from the ground state (energy level 1) to energy levels 2, 3, 4, etc. The wavelengths of the first five photons in this series are 121.6 nm, 102.6 nm, 97.3 nm, 95.0 nm, and 93.8 nm. The ground state energy of hydrogen is −13.6 eV. Based on the wavelengths of the Lyman series, calculate the energies of the first five excited states above ground level for a hydrogen atom to the nearest 0.1 eV.arrow_forwardc) The Bohr model of the atom postulated electrons orbiting around the nucleus in stable orbits. De Broglie explained what orbits could exist by postulating that electrons (and any- thing else) with momentum p have an associated wavelength λ, given by λ=h/p where h is Planck's constant. i) For an electron orbiting around a proton (the Bohr model), equating the centripetal force with the Coulomb force gives the expression v² = e²/(4πεmer). Calculate the speed of an electron orbiting at the Bohr radius, ˜Â = 0.053 nm. ii) Calculate the momenta and the de Broglie wavelengths of the electron of part (i) and of a bird (a racing pigeon) that weighs 0.350 kg and flies at 100 km per hour. iii) Compare the wavelength for the electron that you obtain in (ii) with the circumference of the orbit. Comment on this comparison. Explain briefly what it implies about the other possible orbits of the Bohr model and how the higher orbits might be predicted.arrow_forward
- c) The Bohr model of the atom postulated electrons orbiting around the nucleus in stable orbits. De Broglie explained what orbits could exist by postulating that electrons (and any- thing else) with momentum p have an associated wavelength λ, given by λ = h/p where h is Planck's constant. i) For an electron orbiting around a proton (the Bohr model), equating the centripetal force with the Coulomb force gives the expression v² = e²/(4πmer). Calculate the speed of an electron orbiting at the Bohr radius, rB 0.053 nm. = ii) Calculate the momenta and the de Broglie wavelengths of the electron of part (i) and of a bird (a racing pigeon) that weighs 0.350 kg and flies at 100 km per hour. iii) Compare the wavelength for the electron that you obtain in (ii) with the circumference of the orbit. Comment on this comparison. Explain briefly what it implies about the other possible orbits of the Bohr model and how the higher orbits might be predicted.arrow_forwardA 2.8-cm-diameter metal sphere is glowing red, but a spectrum shows that its emission spectrum peaks at an infrared wavelength of 2.0 μm. Assume e = 1 How much power does the sphere radiate? Express your answer to two significant figures and include the appropriate units.arrow_forwardIn the spectrum described below, lines are indicated that were created as a result of photon emission due to electronic transitions in a hydrogen-like atom (that is, an atom in which there is only one electron). It is a given that all the lines in the current spectrum were created due to the return of an electron from some excited state to the ground state. Given that the frequency of a photon belonging to line C is 1.234x10^16 Hz . calculate the energy of 4 moles of photons belonging to line A (an answer must be given in kJ). D C B Increasing wavelength, A Aarrow_forward
- A hypothetical atom (Fig. ) has energy levels at 0.00 eV (the ground level), 1.00 eV, and 3.00 eV. (a) What are the frequencies and wavelengths of the spectral lines this atom can emit when excited? (b) What wavelengths can this atom absorb if it is in its ground level?arrow_forwardim not sure how to do these 2arrow_forwardb. An electron and a photon has the same wavelength of 0.21 nm. Calculate the momentum and energy (in eV) of the electron and the photon. (Given c =3.00x108 m s-1, h =6.63 x 1034 J s, me=9.11 x 10-31 kg, mp=1.67 x 1027 kg and e=1.60x1019 C)arrow_forward
- For a hydrogen-like atom (the atom contains only one electron, like singly ionized He, doubly ionized Lithium, etc.), the energy levels are given by En = -Z2(13.6)/n2 eV where Z is the atomic number. If an electron in a doubly ionized Lithium atom jumps from the 2nd excited state to the ground state, what would be the wavelength of the emitted photon? A) 3.21 nm B) 3.21 pm C) 6.42 pm D) none of these.arrow_forward| 1+ 19. An electron (mass m) with initial velocity i = voi + voj is in an electric field É = -E,k. If 1o is initial de-Broglie wavelength of electron, its de-Broglie wavelength at time t is given by do a. A = 1+ m2 t? b. A= 1+ t2 m²u λο c. A = 1+ t2 2m² v do d. A = 2+arrow_forwardThe hydrogen spectrum is complex. When a hydrogen atom absorbs a photon, it causes the electron to experience a transition to a higher energy level. Likewise, when the transition occurred from higher to lower energy level, emission spectra obtained. The wavelength of light associated with the n=2 to n = 1 electron transition in the hydrogen spectrum is 3.146 x 10-7 m. What coefficient should this wavelength be multiplied to obtain the wavelength associated with the same electron transition in the B4* ion? Select one: O a. 1/18 Ob. 1/9 O c. 1/5 Od. 1/25 Oe. 1arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningModern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage LearningUniversity Physics Volume 3PhysicsISBN:9781938168185Author:William Moebs, Jeff SannyPublisher:OpenStax
- Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781111794378/9781111794378_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781938168185/9781938168185_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337553292/9781337553292_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781938168000/9781938168000_smallCoverImage.gif)