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9. A measure of the amount of radiation energy absorbed by the body (usually 1 k

ID: 1014523 • Letter: 9

Question

9.         A measure of the amount of radiation energy absorbed by the body (usually 1 kg).            

            a.         Curie                           b.         REM  

            c.         RAD                           d.         RAM

10.       A unit of radiation equal to 3.7x1010 disintegrations/sec.

            a.         Curie                           b.         REM

            c.         RAD                           d.         RAM

11.       Cells in the adult human body most sensitive to radiation include all of the following        except:

            a.         bone marrow               b.         nerve

            c.         skin (including hair     c.         gastro-intestinal (GI) tract

                        cells)

12.       What particle is emitted when a proton converts into a neutron?

            a.         positron                       b.         alpha

            c.         gamma                         c.         beta

Completion:

13.       When the high-energy radiation of alpha, beta, positron, and gamma strikes molecules in the path, the result is the formation of two (2) unstable particles called _____________ and ______________.

14.       ____________________ is the process by which an atomic nucleus, of an unstable atom, loses energy by emitting ionizing particles (ionizing radiation).

15.       When uranium is bombarded by neutrons and splits into fragments, it has undergone a      nuclear _________ reaction.

16.       The amount of fissionable material that will support a self-sustaining chain reaction is             called___________________.

17.       __________________ is a generic name for both a proton and a neutron.

18.       A thermonuclear reaction between hydrogen-2 and hydrogen-3, producing the heavier      helium-4 nuclide, is called a nuclear ___________ reaction.

Explanation / Answer

9.a. Curie  

Radiation energy measure in curie

10. a. Curie

1 curie = 3.7*1010 disintegration/sec

11. a. bone marrow

12. 1H1 -------> 0n1 + +1e0 ( positron)

a.   positron

13. unstable neucli converted to stable neuclie

14. Radioactivity

15. nuclear fission

16. fussion

17. nuclear fussion