1.19 Sodium vapor lamps, used for public lighting, emit yellow light of wavelength 589 nm. How much energy is emitted by (a) an excited sodium atom when it generates a photon; (b) 5.00 mg of sodium atoms emitting light at this wavelength; (c) 1.00 mol of sodium atoms emitting light at this wavelength? 1.20 When an electron beam strikes a block of copper, x-rays with a frequency of 1.2 x 1017 Hz are emitted. How much energy is emitted at this wavelength by (a) an excited copper atom when it generates an x-ray photon; (b) 2.00 mol of excited copper atoms (c) 2.00 g of copper atoms? 1.23 The velocity of an electron that is emitted from a metallic surface by a photon is 3.6 X 103 km-s1 (a) What is the wavelength of the ejected electron? (b) No electrons are emitted from the surface of the metal until the frequency of the radiation reaches 2.50 x 1016 Hz. How much energy is required to remove the electron from the metal surface? (c) What is the wavelength of the radiation that caused photoejection of the electron? (d) What kind of electromagnetic radiation was used?
1.19 Sodium vapor lamps, used for public lighting, emit yellow light of wavelength 589 nm. How much energy is emitted by (a) an excited sodium atom when it generates a photon; (b) 5.00 mg of sodium atoms emitting light at this wavelength; (c) 1.00 mol of sodium atoms emitting light at this wavelength? 1.20 When an electron beam strikes a block of copper, x-rays with a frequency of 1.2 x 1017 Hz are emitted. How much energy is emitted at this wavelength by (a) an excited copper atom when it generates an x-ray photon; (b) 2.00 mol of excited copper atoms (c) 2.00 g of copper atoms? 1.23 The velocity of an electron that is emitted from a metallic surface by a photon is 3.6 X 103 km-s1 (a) What is the wavelength of the ejected electron? (b) No electrons are emitted from the surface of the metal until the frequency of the radiation reaches 2.50 x 1016 Hz. How much energy is required to remove the electron from the metal surface? (c) What is the wavelength of the radiation that caused photoejection of the electron? (d) What kind of electromagnetic radiation was used?
General Chemistry - Standalone book (MindTap Course List)
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Chapter7: Quantum Theory Of The Atom
Section: Chapter Questions
Problem 7.106QP: A hydrogen atom in the ground stale absorbs a photon whose wavelength is 95.0 nm. The resulting...
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Transcribed Image Text:1.19 Sodium vapor lamps, used for public lighting, emit yellow
light of wavelength 589 nm. How much energy is emitted by (a) an
excited sodium atom when it generates a photon; (b) 5.00 mg
of sodium atoms emitting light at this wavelength; (c) 1.00 mol of
sodium atoms emitting light at this wavelength?
1.20 When an electron beam strikes a block of copper, x-rays with
a frequency of 1.2 x 1017 Hz are emitted. How much energy is
emitted at this wavelength by (a) an excited copper atom when it
generates an x-ray photon; (b) 2.00 mol of excited copper atoms
(c) 2.00 g of copper atoms?
Transcribed Image Text:1.23 The velocity of an electron that is emitted from a metallic
surface by a photon is 3.6 X 103 km-s1 (a) What is the
wavelength of the ejected electron? (b) No electrons are emitted
from the surface of the metal until the frequency of the radiation
reaches 2.50 x 1016 Hz. How much energy is required to remove
the electron from the metal surface? (c) What is the wavelength of
the radiation that caused photoejection of the electron? (d) What
kind of electromagnetic radiation was used?
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