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. The ratio of net counts in the photopeak to net counts in the entire spectrum is called: Energy resolution Photopeak efficiency Photopeak window Energy constant None 2. Which of the following best defines isotopes of an element? Atoms with same number of protons, electrons and neutrons. Atoms with same number of protons and neutrons but different number of electrons. Atoms with same number of neutrons and electrons but different number of protons. Atoms with same number of protons and electrons but different number of neutrons. None 3. Which of the following is the principal decay mode of Tc-99m? Beta minus Isomeric transition Pair production Electron capture None 4. Elements with same atomic number and different atomic mass number are called? Isotones Isomers Isotopes Isobars None 5. Which of the following radionuclides has the highest kinetic energy of the positron? C-11. N-13. Rb-82. F-18. None 6. An atom with an unstable nucleus is called a: Radiochemical Radiopharmaceutical Radionuclide Radio wave None 7. Technetium-99m and Technetium-99 are: Isotones Isobars Isotopes Isomers None 8. In isomeric transition decay, the extra energy in the nucleus is released by the emission of: Electrons X-rays Neutrons Gamma photons None 9. Which of the following is the half-life? Reciprocal of the decay constant. Decay constant multiplied by the natural logarithm of two. Time taken for the number of radioactive nuclei to increase by a factor of two. Time taken for the number of radioactive nuclei to decrease by a factor of two. None 10. 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 shielding material The nucleus decays after collision with another particle or atom The nucleus decays without collision with another particle or atom The nucleus decays after collision with shielding material None 1 out of 10 Time's upTime is Up! بواسطة ناصر المطيري|2021-03-31T11:37:09+03:00مارس 31st, 2021|لا توجد تعليقات شارك هذه الصفحة, واترك رأيك حول الموضوع باستخدام وسيلة التواصل التي تناسبك FacebookXLinkedInWhatsAppPinterestEmail عن: ناصر المطيري كبير أخصائيي الطب النووي في مستشفى حفر الباطن المركزي و مؤسس موقع نيوكليرمد. اضف تعليقا إلغاء الردتعليق Δ
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