Physics A multiple-choice quiz consists of: 10 QuestionsQuestions are selected randomly from a collection of 20 questions. More Questions You will get deferent questions every time you take the quiz. Correct AnswersThere could be more than one correct answer, select all that apply.Skip QuestionsYou are allowed to scroll backward and forward before submitting your answers.10 MinutesThe quiz has a time limit. Time's up You can still submit your answers after the allowed period of time has ended . When ready, click Next to start the quiz. Name (Required) Email (Optional) Twitter (Optional) 1. Which of the following is the half-life? Time taken for the number of radioactive nuclei to increase by a factor of two. Decay constant multiplied by the natural logarithm of two. Reciprocal of the decay constant. Time taken for the number of radioactive nuclei to decrease by a factor of two. None 2. Which of the following best defines isotopes of an element? Atoms with same number of protons and electrons but different number of neutrons. Atoms with same number of protons, electrons and neutrons. Atoms with same number of neutrons and electrons but different number of protons. Atoms with same number of protons and neutrons but different number of electrons. None 3. When only image quality is considered, the best possible distance between the collimator and the patient’s body for a gamma-camera equipped with HRES collimator is: Half the collimator diameter 1 in 10 cm Contact None 4. The minimum amount of energy needed to overcome the forces holding the atom together is called: Thermal energy Holding energy Binding energy Kinetic energy None 5. An atom with an unstable nucleus is called a: Radiopharmaceutical Radionuclide Radio wave Radiochemical None 6. If the sample volume of a given activity is increased, the counting efficiency of the well counter will: Approach 0 Increase Not change Decrease None 7. Dual time-point imaging (DTPI) can improve accuracy of positron emission tomography (PET) imaging. DTPI technique is a specialized protocol in which: Flow study is performed followed by static imaging Delay imaging is performed Dual-isotope technique is applied Two days delay imaging is performed None 8. Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting ionizing radiation. The emission is described as spontaneous meaning: The nucleus decays without collision with another particle or atom The nucleus decays after collision with another particle or atom The nucleus decays after collision with shielding material The nucleus decays without collision with shielding material None 9. In isomeric transition decay, the extra energy in the nucleus is released by the emission of: X-rays Neutrons Electrons Gamma photons None 10. Elements with same atomic number and different atomic mass number are called? Isobars Isomers Isotopes Isotones None 1 out of 10 Time's upTime is Up! By Nasser AlMutairi|2021-03-31T11:37:09+03:00March 31st, 2021| Share This Post With Others! FacebookXLinkedInWhatsAppPinterestEmail About the Author: Nasser AlMutairi Senior Nuclear Medicine Specialist at Hafar Al-Batin Central Hospital, Founder of NuclearMed Website. Leave A Comment Cancel replyComment Δ
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