Question

(1). Beta decay of ^60 Co produces a beta particle and--------------(a) , ^60 Fe, (b), ^59 Co. (c) ^56 Mn. (d) ,^60Ni. (2) identify the part of the body that can be studied with radiotracers.(a) tumors. (b) brain (c) speleen (d) heart, (e) all of the above.(3) ,Determine the identity of the daughter nuclide from the alpha decay of X.(a)X Ac ,(b) X PO, (c) X Rn .(d) X Th, (e) X Fr.(4) Which of the following statements is True? (a), The valley of stability is the geographic location where many of the known nuclides were first discovered.(b) If N/Z ratio is too low , there are too many neutrons and the nuclide will undergo beta decay. (c) If N/Z ratio lies somewhere below 1, the nuclide is stable. (d) If N/Z ratio is too high , there are too many protons and the nuclide will undergo position emission or electrons capture.(e) None of the above are true.(5) Which of the following nuclides are most likely to decay via beta decay?(a) F-18 ,(b), I-131, (c), A r -40, (d) Z r-90, (e) P b--206.(6), Determine the identity of the daughter nuclide from the beta decay of XC, (a), X N, (b) X B, (c) X N, (c) X Be, (d), X c.(7) Describe what change occur during position emission.(a) The mass number and atomic number increases.(b) The mass number and atomic number do not change.(c) The mass number decreases and the atomic number is unchanged.(d) The mass number is unchanged and the atomic number decreases.(e) The mass number and atomic number decreases.(8) The radioactive decay of ---------------------is the single greatest source of human exposure to radiation. (a) Ozone, (b) thorium, (c)radon, (d) hydrogen (e) uranium.(9) ,An archaeologist graduate student found a leg bone of a large animal during the building of a new science building .The bone had a carbon ---14 decay rate of 14.8 disintegrations per minute per gram of carbon .Living organisms have a decay rate of 15.3 disintegrations per minute. How old is the bone ? (a) 53.3 years, (b)25 years, (c) 111years (d) 83 years (e) 275 years.(10) Determine the half- life of a nuclide that loses 38.0% of its mass in 407 hours. (a) 291 hours, (b)568 hours (c) 204 hours (d) 586 hours (e) 281 hours.

Answer 1

> LBO + 28 N: 60 t. 27640 Ans @