A Certain Solid Metallic Element Has a Density 7

question 21

Multiple Choice

A certain solid metallic element has a density 7.87 g/cm³ and a molar mass of 55.85 g/mol. It crystallizes with a cubic unit cell, with an edge length of 286.7 pm. Calculate the number of atoms per unit cell.

• A)1
• B)2
• C)3
• D)4
• E)6

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Definitions:

Thoracic Pressure

The pressure within the chest cavity, influencing respiratory and cardiovascular functions.

Claudication

Pain in the legs or arms that occurs during exercise due to inadequate blood supply, often relieved by rest.

Sore Muscles

Muscular pain or discomfort often following intense exercise or physical activity, typically due to overexertion or unfamiliar activity.

Muscle Cramps

Involuntary and often painful contractions of muscles, which can occur in various circumstances, such as exercise, dehydration, or mineral deficiencies.