A photon of 3.53 x 10-28 kg.m/s momentum is emittedfrom a hydrogen atom. To what spectrum series does thisphoton belong, and from what energy level was it ejected?

Q: A hypothetical atom has energy levels uniformly separated by 1.2 eV.At a temperature of 2000 K, what…

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Q: Suppose the electron in the hydrogen atom obeyed classical mechanics rather than quantum mechanics.…

A: Explanation:

Q: 2.8 According to classical physics, the average energy of an electron in an electron gas at thermal…

A: Write the expression of average electron energy in eV. E=32kT

Q: What is the energy (in eV) of a photon emitted from a hydrogen atom when it transitions from an…

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Q: An atom (not a hydrogen atom) absorbs a photon whose associated wavelength is Aab and then…

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Q: If free electrons with kinetic energy 12.75 eV collide with these atoms, what photon wavelengths…

A: The expression for the energy is,

Q: What is the velocity of a 0.400-kg billiard ball if its wavelength is 6.1 cm cm (large enough for it…

A: The wavelength, λ=6.1 cm=6.1×10-2 m   The mass of the billiard ball, m=0.400 kg

Q: Find the de Brolie wavelength of an electron when its group velocity is 2.5 x 10^8 m/s and the rest…

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Q: What minimum accelerating voltage is required to produce an x - ray with a wavelength of 70.0 pm?

A: The energy acquired by a photon when it is accelerated to potential difference ‘V’ is given by

Q: When a wide spectrum of light passes through hydrogengas at room temperature, absorption lines are…

A: When a wide spectrum of light passes through hydrogengas at room temperature, absorption lines are…

Q: The ground-state energy of a harmonic oscillator is 5.60 eV. If the oscillator undergoes a…

A: The energy of the photon is, ∆E=hcλ                                     ...... (1) The ground state…

Q: Find the de Brolie wavelength of an electron when its group velocity is 2.5 x .10^8 m/s and the rest…

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Q: An electron sitting in the -4eV energy level of this atom is struck with a photon of wavelength…

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Q: When 1he excited electron in a hydrogen atom falls from n=5 to n=2, a photon of blue light is…

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Q: The de Broglie wavelength (in nanometer) for an electron moving with 5.739 x 10“ m/s is:

A: Given: The speed of the electron is 5.739x104 m/s.

Q: It is possible that a muon be captured by a proton to form a muonic atom. A muon is identic to an…

A: According to Bohr model of Hydrogen atom, the single electron in the Hydrogen atom revolves around…

Q: A 245 W bulb produces monochromatic U-V light of frequency 1.34x1015 Hz. If the efficiency of the…

A: Power = 245 efficiency = 24% Thus , effective power = 0.24 * 245 = 58.8 W

Q: Using the average speed of a gas, (8RT/piMW)^1/2 determine the average de Broglie wavelength for an…

A: a)average speed = 8RTπMat t = 25 C  = 298 K v = 8*8.314*298π* 0.004v = 1255.9 m/s Therefore, de…

Q: An atom initially in an energy level with -2.59 eV emits a photon that has wavelength 480 nm. What…

A: Energy emitted, E=hcλGiven that, λ=480 nmE=4.136×10-15×3×108480×10-9 eVE=2.585 eV

Q: Show that in an atom, the photons in a 1240 nm infrared beam possesses energies of 1.00 eV.

A: Given data: Wavelength, λ=1240 nm=1240×10-9m Known data: Planck's constant, h=4.136×10-15eV/Hz Speed…

Q: What is the kinetic energy of an electron (in eV), if its de Broiglie wavelength is 8.08 Å? Answer:

A: Given: The de Broglie wavelength is 8.08 Ao.

Q: Potassium is 2 eV. If the surface of the metal is illuminated by a radiation of 360 nm, The energy…

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Q: A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. What series of…

A: Given: The energy of electron beam (E) = 12.5 eVEnergy of gaseous hydrogen at ground state = -13.6…

Q: Calculate the wavelength for an electron having a velocity of 1300km/s

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Q: Calculate the wavelength of a.) a neutron with a translational kinetic energy equal to kT at 298 K.…

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Q: X-rays of wavelength λ = 0.140nm are scatteredfrom carbon. What is the expected Compton…

A: Given: The wavelength of X-ray  λ = 0.140 nm  are scattered from carbon. To find: The expected…

Q: Find the de Brolie wavelength of an electron when its group velocity is 2.5 x 10^8 m/s and .the rest…

A:

Q: An electron in a mercury atom is in the 3d subshell.Which of the following m values are possible for…

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Q: Why does no stable electron orbit with a circumference of 2.5 de Broglie wavelengths exist in any…

A: Electron is described as a standing wave. No stable electron orbit exists with a circumference of…

Q: Assume we have a material with a work function of 4.87 eV. What is the maximum speed, in meteres per…

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Q: eV 0.044, its frequency (in GHz) is: - If the phonon energy is

A: Given: The energy of the photon is 0.044 eV.

Q: When sodium is bombarded with electrons accelerated through a potential difference AV, its x-ray…

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Q: (a)aCalculate the velocity (in m/s) of an electron that has a wavelength of 8.76 µm.   (b) Through…

A: Data Given ,  Mass of electron ( me ) = 9.109 × 10-31 kg Wavelength ( λ ) = 8.76 µm = 8.76 × 10-6 m…

Q: If the metal with work function of 1.1eV is exposed to 356.9nm light, what is the maximum speed of…

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Q: The cutoff frequency of a specific metal is known to be 0.72x1015Hz. During a photociectric…

A: Power of a photon is defined as the energy E used per unit time t, that is , P=Et , where E=nhcλ is…

Q: What is the kinetic energy of an electron in a TEM having a 0.0100-nm wavelength?

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Q: The threshold wavelength for emission of electronsfrom a given surface is 340 nm. What will be the…

A: Threshold wavelength of emission: λo = 340 nm = 340 x 10-9 m Wavelength 1: λ1 = 280 nm = 280 x 10-9…

The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: