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.

Name: 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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Quizplus · Accepted Answer

Rare-earth screens use phosphors with atomic numbers ranging from 57 to 71, which correspond to the lanthanide series of elements. This is because these elements have unique electronic configurations which allow for efficient light emission when excited by X-rays.

The Rare-Earth Screens Use Phosphors with Atomic Numbers of