The target of an X-ray tube is made up of which metal?
Correct answer: D. Tungsten
- A. Iron
- B. Nickel
- C. Brass
- D. Tungsten
Explanation
Most x-ray tube anodes are made of tungsten (the target material). Tungsten has a high atomic number (Z = 74) and a high melting point of 3370 °C, with a correspondingly low rate of evaporation.
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About Biological and Medical Uses of Radiation
Radiation in medicine includes X-rays and gamma rays for imaging, radioactive tracers for diagnosis, and controlled radiation for destroying cancerous tissue. The topic also covers CT scans, PET imaging, radiotherapy, sterilisation, half-life and dosage, alongside biological damage, shielding and the need to balance diagnostic or therapeutic benefit against exposure.
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