Sodium hydride (NaH) crystallizes in the rock-salt structure, with four formula units of NaH per cubic unit cell. A beam of monoenergetic neutrons, selected to have a velocity of 2.639 × 103 ms-1 , is scattered in second order through an angle of 2u= 36.26° by the parallel faces ofthe unit cells of a sodium hydride crystal.(a) Calculate the wavelength of the neutrons.(b) Calculate the edge length of the cubic unit cell.(c) Calculate the distance from the center of an Na+ ion to the center of a neighboring H- ion.(d) If the radius of an Na+ ion is 0.98 Å, what is the radius of an H- ion, assuming the two ions are in contact?
Sodium hydride (NaH) crystallizes in the rock-salt structure, with four formula units of NaH per cubic unit cell. A beam of monoenergetic neutrons, selected to have a velocity of 2.639 × 103 ms-1 , is scattered in second order through an angle of 2u= 36.26° by the parallel faces ofthe unit cells of a sodium hydride crystal.(a) Calculate the wavelength of the neutrons.(b) Calculate the edge length of the cubic unit cell.(c) Calculate the distance from the center of an Na+ ion to the center of a neighboring H- ion.(d) If the radius of an Na+ ion is 0.98 Å, what is the radius of an H- ion, assuming the two ions are in contact?
Chemistry: An Atoms First Approach
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ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter8: Gases
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Sodium hydride (NaH) crystallizes in the rock-salt structure, with four formula units of NaH per cubic unit cell. A beam of monoenergetic neutrons, selected to have a velocity of 2.639 × 103 ms-1 , is scattered in second order through an angle of 2u= 36.26° by the parallel faces of
the unit cells of a sodium hydride crystal.
(a) Calculate the wavelength of the neutrons.
(b) Calculate the edge length of the cubic unit cell.
(c) Calculate the distance from the center of an Na+ ion to the center of a neighboring H- ion.
(d) If the radius of an Na+ ion is 0.98 Å, what is the radius of an H- ion, assuming the two ions are in contact?
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