Elsevier Adaptive Quizzes

Elsevier Adaptive Quizzes 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 - 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 - 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. What is the outcome when the tissue atomic number is increased during differential absorption? a. Higher x-ray transmission b. Fewer photoelectric interactions c. Change in Compton interactions d. No change in Compton interactions - d. No change in Compton interactions When the tissue atomic number is increased, there is no change in Compton interactions. The x- ray transmission is lower, not higher. With an increase in the tissue atomic number, the photoelectric interactions are much higher. The interaction of x-rays with matter that constitutes the greatest hazard to patients in diagnostic radiography is what? a. Pair production b. Compton interaction c. Photoelectric interaction d. Classic coherent scattering - c. Photoelectric interaction The interaction of x-rays with matter that constitutes the greatest hazard to patients in diagnostic radiography is photoelectric interaction. Pair production and classic coherent scattering do not typically occur in the diagnostic energy range. Compton interaction constitutes the greatest hazard to radiologic technologists. How many neutrons does an atom with an atomic number of 20 and an atomic mass number of 40 contain? a. 20 b. 30 c. 40 d. 50 - a. 20 An atom contains a number of neutrons equal to the difference between the atomic mass number and the atomic number. As the atomic number of the atom under discussion is 20 and its mass number is 40, the atom contains 20 (40 - 20) neutrons. All the other options (30, 40, and 50) are incorrect as per the aforementioned calculation. The electrical energy supplied to the X-ray tube is converted into what form of energy for the production of x-rays? a. Nuclear energy b. Chemical energy c. Mechanical energy d. Electromagnetic energy - d. Electromagnetic energy The electrical energy supplied to the x-ray tube is converted into electromagnetic energy for the production of x-rays. Nuclear energy, chemical energy, and mechanical energy are not associated with the production of x-rays. What can be inferred from the number of electrons present in the outermost shell of an atom? a. The number determines the valance of the atom. b. The number is lower than its group in the periodic table. c. The number is higher than its group in the periodic table. d. The number is always higher than its