The K _$\infty$ X Rays Arixing from a Cobalt (Z =

question 20

Multiple Choice

The K _$\infty$ x rays arixing from a cobalt (Z = 27) target have a wavelength of about 179 pm. The atomic number of a target that gives rise to K _$\infty$ x rays with a wavelength one-third as great ( $\approx$ 60pm) is:

• A) Z = 9
• B) Z = 10
• C) Z = 12
• D) Z = 16
• E) Z = 46

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