Question

Which radioactive isotope is used to detect tumours?

• A. ${}^{74}As$
• B. ${}^{24}Na$
• C. ${}^{131}I$
• D. ${}^{60}Co$

Answer 1

Answer: (A)

${}^{74}As$

Uses of some radioactive isotopes : -

$\left(1\right)$ Arsenic-(74) : used to detect tumours.

$\left(2\right)$ Sodium-(24) : for studies of electrolytes within the body.

$\left(3\right)$ Iodine-(131) : widely used in treating thyroid cancer and in imaging the thyroid.

$\left(3\right)$ Cobalt-(60) : used for external beam radiotheraphy.