The metal used for making X-ray tube window is:

Options

A $Mg$
B $Na$
C $Be$
D $Ca$

Correct answer

C. $Be$

Step-by-step solution

Many metals can be used to make the anode of a X-ray tube, but only one metal is most suitable for the windows. It is beryllium because beryllium has lowest electron density outside its nucleus, and will absorb least X-ray.

Beryllium is used in making windows in X-ray tubes.

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