Compare the Packing Efficiency of Face-Centered Cubic Gold and Face-Centered

question 95

Multiple Choice

Compare the packing efficiency of face-centered cubic gold and face-centered cubic sodium chloride.

• A)Packing efficiencies cannot be defined for one or both of these.
• B)The efficiency of packing in the gold unit cell is higher.
• C)The efficiencies of packing in the two lattices are the same.
• D)The efficiency of packing in the sodium chloride unit cell is higher.
• E)There is no way to compare without further information.

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Definitions:

Lateral Geniculate Nuclei

A part of the brain located in the thalamus that acts as a relay center for visual information received from the retina before it is sent to the visual cortex.

Activation-Synthesis

A theory of dreaming that suggests dreams are the result of the cerebral cortex interpreting random signals from the lower brain during REM sleep.

Reticular Formation

A network of neurons in the brainstem that's involved in arousal, wakefulness, and transmitting sensory information to the brain.

REM Sleep

Sleep characterized by rapid eye movements, EEG patterns similar to wakefulness, speeded heart rate and respiration, near-paralysis of skeletal muscles, and highly visual dreams.