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c h 1 . aS L(OLLQfryt / / Class Date ame — Part A Completion and terms Use this completion exercise to check your understanding of the concepts short term, that are introduced in this section. Each blank can be completed with a phrase, or number 2 . and are called 1 Isotopes with unstable nuclei are 3 of radioisotopes decay to The 5 plus emission of large amounts of . 4 nuclei The radiation may 1. 2. 3. i be alpha, _, radiation consists of 7 or gamma. 8 alpha particles (positively charged nuclei) that are easily stopped by a sheet of paper. Beta radiation is composed of Beta radiation is more fast-moving particles, which are penetrating than alpha radiation; it is stopped by _iQ. radiation is electromagnetic radiation. Gamma radiation 11 has no _i or electrical charge. It is extremely penetrating. 1L_ bricks and 14 reduce the intensity of gamma radiation but do not completely 15 it. 4. ii’ 1 5. 6. 7. 8. C( S 9. io. 11. i,cJ (CfWY’C\ ) 12. 13. I 14. ‘5. Part B True-Fake Classij5i each of these statements as always true, AI sometimes true, SI or never true, NT 5 16. Beta radiation is emitted when a radioisotope decays. 17. Gamma radiation has a negative charge \ \ rn. 19. Gamma radiation is high-ener electromagnetic radiation. 9u + e 20. When a beta particle is emitted, the atomic number increases by 1, and the mass number stays the same. ) _ __ __ ___ ___ ___ ___ ___ ___ Part C Matching lumn A. umn B to the correct term in Co Match each description in Col Column B Column A table nucleus releases a. the process in which an uns energy by emitting radiation 21. radioisotopes le nuclei and undergo b. isotopes that have unstab radioactive decay mass or electrical charge c. high-energy photon with no breaking apart of a d. electrons resulting from the neutron in an atom 22. radioactive decay 23. gamma ray L# ‘— d 24. alpha particles a radioactive source e.. helium nuclei emitted from . 25. beta particles Part D Problems ce provided. Answer the following in the spa these processes. 26. Write nuclear equations for a. The alpha decay of 9Po — 4jI 2M t Pb b. The beta decay of 2 ATION SECTION 25.1 NUCLEAR RADI an atom that number and atomic number of ss ma the to s pen hap at Wh 1. )CS c îç undergoes beta decay? LTV How do the nt undergoea1pha particle decay. 2. A radioisotope of an eleme ber of the particle change? %ç 4c , atomic number and mass num nucleus of the following isotopes. 3. Give the composition of the 95u ‘ C. A j b • 136 53 1 N 64 a. 28 ing equations. 4. Complete each of the fow n a. ‘C—_?e +? m 2 b. A - He + c. ‘N—>’O+? ‘ ? 2 4i /