Elsevier Adaptive Questions with correct answers

A radiologic technologist is working on barium and iodine. Which term does the radiologic technologist use to refer to 134/56 Ba and 131/53 I ? a. Isobar b. Isomer c. Isotope d. Isotone Answer d. Isotone Isotones differ in their atomic numbers and mass numbers, but they have the same number of neutrons, that is, a constant for the quantity a (atomic number) - z (mass number) a-z. Types of ionizing radiation used in various techniques have different ranges of penetrability into the skin. Which type of ionizing radiation penetrates least into the skin? a. X-ray b. Gamma ray c. Beta particle d. Alpha particle Answer d. Alpha Alpha particles have the least penetration into the soft tissue, about ≤ 0.1 mm. Beta particles have a penetration range of 0 to 2 cm. Gamma rays and x-rays have a penetration range of 0 to 30 cm for the soft tissues such as skin.