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Multiple Choice Chemistry Problem. Please Explain.?

Multiple Choice Chemistry Problem. Please Explain.? - Chemistry Forum

Multiple Choice Chemistry Problem. Please Explain.? - Chemistry Forum. Discuss chemical reactions, chemistry.


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Old 10-28-2008, 04:19 AM
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Default Multiple Choice Chemistry Problem. Please Explain.?



Structures of molecules can be determined by diffraction of waves through crystalline solids. In order to determine the relative locations of atoms, the wavelength of the diffracting photons or particles must be close to the distance between atoms (100-200 pm in many cases). Which of the following would be most able to detect distances of 100-200 pm by diffraction:

A. neutrons (mass 1.67 x 10^-27 kg) with a velocity of 4.6 x 10^4 m/s
B. X-rays having energy of 1.20 x 10^6 kJ/mol
C. electrons (mass 9.11 x 10^-31 kg) with a velocity of 6.4 x 10^5 m/s
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