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

question 63

Multiple Choice

The K _$\infty$ x rays arising 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 = 26
• C)Z = 28
• D)Z = 46
• E)Z = 81

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