What is the nuclear binding energy of a helium nucleus in KILOJOULES? A. 4.5 x 10 9 kJ B. 6.3 x 10 11 kJ - C. 4.5 x 10 12 kJ - D. 6.3 x 10-8 kJ

Macmillan l 30: F2 W S A 210.2 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to 26.28 ng. How many half-lives of the unknown radioactive substance have occurred? number of half-lives: #3 H 80 F3 mmand E D A GA $ X C 4 OOD 886 F4 R F % от ото 5 V F5 T G ^ 6 B F6 Y & 7 H 8 F7 U N 00 * 8 DII FB J L - ( 9 M K DD F9 O . V - ... I 4 F11 { [ option + = ? 11 1 F12 } ] half-lives delete return st

29. When high energy radiation knocks an electron out of an atom that it strikes, a is formed. O a. free radical Ob. daughter nucleus Oc. radioisotope Od. fission reaction

46. A 4.1-ug sample of cesium-137 yields an activity of 3800 uCi. What is the SI value for this amount of activity? A. 1.0x10 Bq В. 1.6х10* Ва C. 930 Bq D. 141 MBq A. 70 m В. 70 mm 47. The Shallow Dose is the whole-body skin dose received at depth from external radiation. C. 70 cm D. 70 um

18. Samarium-151 is a beta emitter enba ue aUM the product nucleus. 19. How much of a 24-gram sample of Radium-226 will remain unchanged at the end of three half-life periods? Accessibility: Good to go a ip

I. Write the complete nuclear equations for the decay of the following radionuclides and calculate their particle the daugther energy a. the α decay of 238Pu b. the negatron decay of 60Co leading to the gamma decay c. the positron decay of 11C d. the electron capture decay of 208Bi