Which of the Following Statements Concerning a Face-Centered Cubic Unit

question 15

Multiple Choice

Which of the following statements concerning a face-centered cubic unit cell and the corresponding lattice, made up of identical atoms, is incorrect?

• A) The coordination number of the atoms in the lattice is 8.
• B) The packing in this lattice is more efficient than for a body-centered cubic system.
• C) If the atoms have radius r, then the length of the cube edge is  8 × r.
• D) There are four atoms per unit cell in this type of packing.
• E) The packing efficiency in this lattice and hexagonal close packing are the same.

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