ARRT level 1 module 1 jko questions and answers with solutions 2025

What unit is radioactivity NOT measured in? - ANSWER Count Rate Is an isotope has an atomic number of 92 and a mass number of 196, what is the number of neutrons? - ANSWER 104 What is the term used to describe the actual mass of an atom? - ANSWER Atomic Weight How much radioactivity is left? Initial Activity- 6 Ci of Sr-90 Time Elapsed- 16 years, 3 months Half Life- 28.8 years - ANSWER 4.06 Curies How much radioactivity is left? Initial Activity- 17 Ci of Cf-252 Time Elapsed- 6 years, 7 months Half Life- 2.6 years - ANSWER 2.87 Curies What is the term used to describe the number of protons in the nucleus of an atom? - ANSWER Atomic Number What is the term used to describe the number of protons and neutrons in the atom? - ANSWER Atomic Mass Match the atomic particles with their respective charges. - ANSWER Electron- Negative Nucleus- Neutral Proton- Positive If uranium h