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In: Mechanical Engineering

(a) What is the difference between atomic structure and crystal structure (b) Sketch the BCC and...

(a) What is the difference between atomic structure and crystal structure

(b) Sketch the BCC and the FCC unit cells and show that the atomic packing factor for a BCC unit cell is 0.68.

(c) Molybdenum has a BCC unit cell, has an atomic radius of 0.1363 nm, and an atomic weight of 95.94 g mol. Compute its theoretical density and compare your answer with its experimentally measured density of 10.22 g cm³. The Avogadro’s number is 6.023x1023 atoms mol- and 1 nm is 109 m.

(d) What is a polymorphic (allotropic) phase change? Give example.

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Expert Solution

samet mamat answered 1 year ago
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