Question

12. Which scientist is known for coining the term "radioactivity" as it applied to a phenomenon being studied with respect to radium and radium daughter nuclides? A. Einstein B. Curie C. Becquerel D. Bohr 13. How many Becquerels (Bq) would 4200 millicuries (420 mCi) represent? Bq. imaging. 14. Computed tomography was developed in the beginning with A. 1890s B. 1920s C. 1970s D. 1990s (write in the type of imaging) 15. Using the chart of the nuclides the half life for gold-198 (198Au) is decay modes are emission __and it's principal 16. The () is an expression that gives the probability of a given nucleus to undergo a spontaneous nuclear transition (commonly termed "disintegration") in a time interval. It has the units of 1/t or t-1 A. Half life B. Dose C. Activity D. Decay constant

Answer 1

ANS. 12. The term radioactivity is coined by Marie Curie. hence the correct option is B) Curie.

ANS. 13. 1 Ci = 3.7×10¹⁰ Bq. Therefore, 4200 mCi represents 155.4 X 10⁹ Bq.

ANS. 14. Computed tomography was developed in 1972 i.e. option C. 1970s beginning with diagnostic imaging.

ANS. 16. Decay constant