Which One of the Following Statements About Unit Cells and Packing

question 95

Multiple Choice

Which one of the following statements about unit cells and packing in solids is incorrect?

• A) In any unit cell of a solid crystal, each face of the cell must have an opposite face which is equal and parallel to it.
• B) The faces of a unit cell must all be at angles of 90\(\degree\)to each other.
• C) The coordination number of atoms in a close packed metal is 12.
• D) The packing efficiency in fcc structures is higher than in bcc structures.
• E) The packing efficiency in fcc and hcp structures is the same.

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Definitions:

Accounts Receivable Turnover

A financial ratio indicating how many times a company collects its average accounts receivable during a period.

Accounts Receivable

Debt that customers hold towards a business for received goods or services which remain unpaid.

Cash Sales

Transactions in which the buyer pays the seller immediately with cash or other forms of immediate payment.

Average Collection Period

The average number of days it takes for a company to receive payments owed by its customers.