The Molecular-Orbital Model for Ge Shows It to Be

question 50

Multiple Choice

The molecular-orbital model for Ge shows it to be

• A)a conductor, because all the lower energy band orbitals are filled and the gap between the lower and higher bands is large.
• B)an insulator, because all the lower energy band orbitals are filled and the gap between the lower and higher bands is large.
• C)a semiconductor, because the gap between the filled lower and empty higher energy bands is relatively small.
• D)a semiconductor, because the gap between the filled lower and empty higher energy bands is large.
• E)a conductor, because its lower energy band orbitals are only partially filled.

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Definitions:

ATP

Adenosine triphosphate, a molecule that carries energy within cells, used as a direct source of energy for many cellular processes.

ADP

Adenosine diphosphate, a molecule involved in ATP synthesis, it releases energy when it is converted to ATP in cellular respiration.

Muscle Contraction

The tightening of muscle fibers initiated by electrical impulses, leading to shortening of the muscle and movement or force generation.

Sarcoplasmic Reticulum

Smooth endoplasmic reticulum of skeletal muscle cells; surrounds the myofibrils and stores calcium ions.