Potassium Bromide, KBr, Crystallizes Like NaCl in a Face-Centered Lattice

question 20

Multiple Choice

Potassium bromide, KBr, crystallizes like NaCl in a face-centered lattice. The ionic radii of K⁺ and Br^- ions are 133 pm and 195 pm, respectively. Assuming that all Br^- ions are positioned in the face and corners of the unit cell, while the K⁺ ions are positioned along the edge alternating between anions, calculate the length of a unit cell edge.

• A) 230 pm
• B) 328 pm
• C) 523 pm
• D) 656 pm
• E) 780 pm

Understand the concept and structure of contrapositives in logical propositions.

Identify the relationships between different logical propositions such as subalternates, contradictories, contraries, converses, and obverses.

Apply logical reasoning to analyze the validity and relationship between propositions.

Distinguish between different types of logical relationships, including subcontraries and contrapositives.

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Definitions:

Stockholders

Individuals or entities that own shares in a corporation, granting them certain rights and potentially a share in the company’s profits.

Stock Dividends Distributable

A portion of a company's retained earnings that is allocated to be distributed to shareholders as additional shares of stock.

Equity Account

An account representing the owner's or shareholders' interest in a company, reflecting capital invested plus retained earnings minus withdrawals.

Shares "Owed"

Likely incorrect or a misunderstanding; potentially refers to shares that are borrowed and need to be returned in transactions such as short selling (NO real key term).