Chemistry

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12 Dec 2019

The existence of discrete (quantized) energy levels in an atom may be inferred from ?
(answer is d)explain why.
a. experiments on the photoelectric effect
b. diffraction of electrons by crystals
c. X-ray diffraction by crystals
d. atomic line spectra

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Physical Chemistry

Which of the following statements is true?

A) A diffraction pattern generated by an electron gun is formed by electrons interfering with one another.

B) The inability of classical theory to explain the spectral density distribution of a blackbody was called the ultraviolet catastrophe.

C) There is no upper limit to the photon energy that can be observed in the emission spectrum of the hydrogen atom.

D) Einstein explained the photoelectric effect by postulating that the energy of light depends on its frequency.

	B and D
	A and B
	B and C
	A and D

Which of the following statements is true?

A.The highest photon energy in the emission spectrum of the hydrogen atom corresponds to the energy released when an electron makes a transition from n â â to the n = 1 state.

B.Niels Bohr explained the discrete emission spectrum of H by assuming special orbits in which there were an integral number of wavelengths in the orbit.

C.Because of wave-particle duality, a sharp transition between ray optics and diffraction is observed.

D.The de Broglie wavelength of a particle moving at a given velocity increases with its mass.

1.A and B.

2.A and C.

3.B and D.

4.B and C.

Which of the following statements is true?

A.The highest photon energy in the emission spectrum of the hydrogen atom corresponds to the energy released when an electron makes a transition from n ? ? to the n = 1 state.

B.Niels Bohr explained the discrete emission spectrum of H by assuming special orbits in which there were an integral number of wavelengths in the orbit.

C.Because of wave-particle duality, a sharp transition between ray optics and diffraction is observed.

D.The de Broglie wavelength of a particle moving at a given velocity increases with its mass.

1.A and B.

2.A and C.

3.B and D.

4.B and C.

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The existence of discrete (quantized) energy levels in an atom may be inferred from ?
(answer is d)explain why.
a. experiments on the photoelectric effect
b. diffraction of electrons by crystals
c. X-ray diffraction by crystals
d. atomic line spectra

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The existence of discrete (quantized) energy levels in an atom may be inferred from ? (answer is d)explain why. a. experiments on the photoelectric effect b. diffraction of electrons by crystals c. X-ray diffraction by crystals d. atomic line spectra

Related textbook solutions

Basic Chemistry

Principles of Chemistry Molecular Approach

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Weekly leaderboard

The existence of discrete (quantized) energy levels in an atom may be inferred from ?
(answer is d)explain why.
a. experiments on the photoelectric effect
b. diffraction of electrons by crystals
c. X-ray diffraction by crystals
d. atomic line spectra