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

---

Definitions:

Monocytes

A type of white blood cell that plays a critical role in the immune system by killing pathogens, removing dead cells, and stimulating the action of other immune cells.

Sympathetic System

A part of the autonomic nervous system that activates what is often termed the fight or flight response, preparing the body for action.

Parasympathetic System

Part of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles.