The Rare-Earth Screens Use Phosphors with Atomic Numbers of

question 36

Multiple Choice

The rare-earth screens use phosphors with atomic numbers of

• A)3 to 11.
• B)12 to 27.
• C)57 to 71.
• D)98 to 131.

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Definitions:

Trachea

The windpipe, a tube that connects the larynx to the bronchi of the lungs.

Pharynx

A muscular tube that connects the mouth and nasal passages with the esophagus and larynx, serving both respiratory and digestive functions.

Larynx

The voice box located in the neck that contains the vocal cords; involved in breathing, producing sound, and protecting the trachea.

Epiglottis

A flap of cartilage located at the base of the tongue that prevents food and drink from entering the windpipe during swallowing.