In Crystalline Sodium the Distance Between Adjacent Layers in a Certain

question 20

Multiple Choice

In crystalline sodium the distance between adjacent layers in a certain set of equally spaced planes of atoms is 4.28 Å. What is the maximum order n for observation of Bragg diffraction using X-rays with a wavelength of 1.936 Å?

• A) 1
• B) 2
• C) 3
• D) 4
• E) >4

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Definitions:

Internal Threads

Threads located on the inside surface of a hole or cylinder, designed to mate with external threads of a bolt or screw.

Tap

A hand- or machine-actuated tool used to cut internal threads.

Click Type

A type of mechanism, often found in torque wrenches, that produces a clicking sound to signal the user when a pre-set torque value is reached.